Selective Repeating

I would like to know if it's possible (and how) to configure repeating so that it's only active on certain characters in a character set. I'd for example want to issue commands en masse to only DPS then globally issue other commands.

[Alge]

That concept involves using Action Target Groups. See FAQ: How do I broadcast only to certain windows? and the post linked therein.

If you need further specifics it would be helpful to know which game you are playing.