Stefan,
Yes, this is possible. WiNG does have a VSA for "WING-VLAN-NAME" that can be used to specify a string name value in a RADIUS Access-Accept response.
Along with setting that side up, you would also need to create the string name Alias within each RF Domain (each RF Domain representing a different Location for you) and the different VLAN that should be used for that RF Domain (The VLAN Alias in each RF Domain would then have a name-to-VLAN mapping that you specify)
***The Attribute Name shown below in green is incorrect in the graphic. It should read "
WING-VLAN-Name"