I would think if you're in multiple groups, you'd just pick to show the one that has the higher ranking. Like, I know I'm in two... both Welcoming Committee and Superheroines. Since, I think anyway, that Superheroines are considered more... I don't know the right term here... that would be the one to show since it'll clue people in. I mean, if I just showed Welcoming Committee, people might not think that they can ask me for things more specific to Superheroines, which has a bit more involved than just the Welcoming Committee does, etc etc. Does that make any sense??? Otherwise, I say that special custom badges might need to be made indicating involvement in whichever groups you're in.