I dont think so - at least not in my configuration. Each MG app has a
unique key. To verify I performed the following test:
1) Logged in to one group
2) verified I was automatically able to login to the other
3) Logged out of the 1st group
4) dumped session - observed that session var had been cleared
5) Moved on over to 2nd group, dumped session - session is NOT cleared
6) went back to 1st group, verified session was STILL cleared
7) back to 2nd group, session is still valid
Bear in mind I am dumping these session scopes in application.cfm
RIGHT after the cfapplication tag.