If a student attends more than one school (ie, MCC and ASU), can they participate on more than one team? And are they eligible to participate on a team at either school?

Each student may only participate on one team for a particular game. So, if someone was enrolled at MCC and ASU, they could only be on one team in one particular game. They could, however, participate on another team as a student of another school in another game -- as long as the timing works for them to actively participate in both games.