Hi
I don't quite understand your question. If you have two SmartServers in the same network then one has to be the master and the other a stupid LON device or you have to use LNS sync mode. If you want to have them in different networks that should be no problem, just give them different domain IDs (don't know how that affect your bandwidth though if they are sitting on the same physical medium). If you want to have them on different physical media while still having them in the same network you could get router licenses for them and connect the channels through the SmartServer via an IP backbone.You'd need LNS for that as well.
Regards
Thorsten