This Tag Template is only triggered by events that contain a [VALUE] placeholder. I did a quick check using a sample Wonderware database and the interface queries, and I do not see any events where there is both a Value and a UserID/ReviewerID. I suspect that it is the same on your system.
You could try triggering on the [EVENT] placeholder to increase the scope of your trigger but I am not certain if that would work either.
Is there a particular event for which you are trying to capture the UserId/ReviewerID?
This is complicated enough that you may want to consider creating a Tech Support case, especially if you are able to provide a copy of your source data.