Is it possible to have two vlans created on IAP?
YEP. (AND EVEN MORE :) )
IAP by default working as native VLAN is the mangment vlan. and the rest of the VLANS (the tagged ones) are for clients/other services.
simple, What you should do?
config the port of the switch that connected to the IAP's as trunk (Native vlan 200 untagged = mangment and VC group of all your AP'S , other vlans - for example VLAN 500 = tagged. )
after you configure your switch port as needed - dont forget to reboot the IAP , in order for the units to use the new native vlan (200 untagged) you just configured.
Than configure the SSID to use VLAN 500