Each community has a Minimod incharge of them. The list is under the cut, but I also made you a lovely organisational diagram to go with it:
Organisational Chart. PDF.
Platform (&The Great Hall (kinda comes with Platform))
Hogwarts Icons (&Their Mods Comm)
Aditional notes: HiH we all have, and the Common Rooms Steph & I will keep just us for the moment, because they have the Prefects. Steph and I are also there for any community.
What does this mean? It means that if you have a problem with one of those communities then you should contact the minimod, but CC Steph and I in as well (although it's not strictly necessary).
I've also made you guys a flow chart that I'm going to link to in the userinfo! It's for helping people figure out who it is they need to contact!
What Do I Do?. PDF.