AD integration

Hello, I just got Freeradius running on Ubuntu and have successfully configured integration Active Directory using Samba and NTLM_AUTH. When I run "radtest" against Freeradius and put in AD credentials, it is successful. My next goal is to configure Freeradius to assign 802.1X VLANs for a wireless environment. In other words, users who are a member of ADGROUP1 get assigned vlan # 111, and users who are a member of ADGROUP2 get assigned vlan #222. I am unclear which direction to go to accomplish this. Any help would be greatly appreciated. Thanks much Mike Whitlow