The effect tracker is available from Virtual Combat Cards 0.90 onwards. It will allow easy tracking of individual effects and includes expiring effects that end at the end or start of a combatants round.
In order to create an effect you use the Effect Creation pane. Active effect will be visible on the Active Effects pane. Starting and ending rounds will automatically expire effects as needed.
Effect Creation pane is used to create and add an effect to a combatant. The pane contains two identical areas that can be used to create distinct effects. Notice that VCC handles effects not conditions. Effect may include a set of conditions like: “Slowed and Dazed”; Duration: “Save Ends”.
The pane looks like this (without the black and white numbers):

The meaning of the numbers in the black circles:
The duration combo box is used to determine the duration of an effect. Most of the effect durations should be self explanatory (assuming you play D&D 4E). The following durations have some special behavior:
As with previous version, additional information about conditions can be written in the Comments and Notes pane. This is a good option for condition like: prone and other condition that are in effect until countered.
All effects currently active on a combatant are displayed on the Active Effects pane. This will provide a quick view of the effect description, duration, and source. This pane also allows you to sustain effect and cancel effects.
As shown below:

The colors have a special meaning:
At the bottom of this pane are two buttons:
As will all tracked object, you can undo actions in case an invalid command was executed.
All effect descriptions (except Mark effects) can be edited by double clicking on the description on the table in the Active Effects pane. Place the new text and press Enter. This is not supported for mark, in this case simply add a new mark.
Starting with version 1.5.0 Virtual Combat Cards can track ongoing damage and regeneration. Effect that have the proper wording will be handled on the beginning of rounds and prompt the user to input the effective amount of healing or damage to apply.
The condition text will be split into parts on the and work and the progression separators ( -> or /).
Ongoing damage
For ongoing damage the the condition must include the text ongoing followed by a number, text after this will be included in the prompt. So these condition texts will prompt the user for amount of damage to apply:
All these will trigger the ongoing damage prompt. In the 1d20 case, the value suggested will be 1 hit point. Not that for effect that have two damage type you must use the ampersand (&) sign not and, or the match will skip the and word.
Regeneration
To have VCC prompt for regeneration the condition text must include the prefix regen followed by a number. So the following text will cause a prompt for regeneration:
Note: regenerate will always be prompted first. In some conditions this may lead to less hit point being restore. DM/User discernment is necessary in these cases.
Some effects like Sleep and Medusa petrification start of in one condition then progress to worst conditions. To be able to handle these effects Virtual Combat Cards includes two features. First there is the Save ends (Special) duration options. Secondly starting on version 1.5.0, users can specify a set of effects that will take place on a failed save.
To do this, users must right the condition separated by either arrows (->) or slash (/). On the save prompt VCC will suggest the next condition if the save fails.
As examples:
On the first failed save the effect will become unconscious
On the first failed save the effect will become immobilzed -> petrified, and on a subsequent failed save it becomes petrified
Notice that the effect will still remain being prompted for change after the last condition is reached. In the case of petrification, you could simple pass the saving throw and place a note on the creatures note box.
In line with VCC general design goals tracking effects and condition was done in a simple and generic way. While there are all types of condition and effects, some the most common ones should work well. Designing a compact and effective interface was complex, and not all cases may be easy to track. In this section we present some tips and trick that may make you life easier.
This should provide the correct way to handle this. Of course you can ask for the warlock to track this, and just put the Save End portion of the effect on the tracker.