Aruba VMC in tunnel mode Same ssid different vlan, roaming issues

Hello,

Not sure what the best way to do this would be in a tunneled enviornment, but we need to have an ssid, which has a different vlan per ap group but same name. I have this working, However when i connect and roam, I can get an ip in another group, but roaming back my ip does not change. Would a named vlan work better in this case? assign the named vlan two vlans, and assign that to the vap?