Ok, I've been trying to figure this out all night. It seems like it ought to be simple but I've really had no luck so far figuring this out on my own or searching everywhere I can. It might not be possible, but at this point I have no idea one way or the other.

I'm trying to make a trigger_multiple filtered to a single player class. There is the deceptively obviously named filter "filter_activator_class" but that doesn't seem to be what I want.

However, if that IS what I want, I still don't know the correct entity terms to tell it to filter. If anyone knows anything about this it'd be greatly appreciated.

simple enough:
create a filter_activator_team and set it to the team you want to be able to pass the filter. Then make whichever setting to "Allow".
Finally, enter the name of the filter_activator_team in the trigger_multiple's filter field.

I can filter the teams easily enough, it's the player classes I want to filter though.

Guess I didn't read your post carefully, sorry. Now I don't think you have any means to do this.

I'm also pretty sure it isn't possible. The class filter is probaly for classes of entities, eg env, phy...

Yeah that's what I had gathered from my searches, could it be possible that the player has a certain aspect attached to them due to their class I could filter out? This is all stuff I'm not familiar with so I know how unlikely that is, but worth a shot I suppose.

There's certainly other ways I can do what I want but they are less than satisfactory sadly.