I can to have two SSIDs for all branch of my country, but each ones in a differents subnets,for example:
Area 1
SSID 1 : guest -> 192.168.1.1
SSID 2 : office -> 192.168.2.1
Area 2
SSID 1 : guest -> 192.168.3.1
SSID 2 : office -> 192.168.4.1
Area 3
SSID 1 : guest -> 192.168.5.1
SSID 2 : office -> 192.168.6.1
I have with a Wireless Lan Controller 4402 and version 4.