I agree. You will have to use zones. But zones are only supported by gamestudio professional.
But you can also use zones with ANet (a plugin created by me) and your Commercial edition.

Just look into my signatur. (A HowTo create Zones is not included yet but I'm already working on it).

ANet - A stable and secure network plugin with multi-zone, unlimited players, voip, server-list features,... (for A7/A8)!
get free version