WowAce

What Grid2 version and language of WoW are you using?
r693, eng

Please provide any additional information below.

I use one profile for all of my classes which works great. The only issue I have is with debuffs. What I want, for example, is to have a bottom center'ed icon display all 4 types (poison, disease, curse, magic) but then have it simply not show if it is not cleansable by the class I am playing. A simple checkbox or something like that would be ideal. Perhaps I missed something that already enables this. Thanks for any help.

That option does not exists in Grid2, it is not necessary:
For example maybe I cannot dispel a poison, but i want to know if the player have a poison because sure he needs more healing.
If you still want to hide undispeleable debuffs, its simple, go to:
Indicators > icon-center  > Statuses tab
and uncheck the debuffs statuses you dont want to see.