NAP with freeradius

Hello everybody ! I installed freeradius-server-2.1.12 with Mysql like a network access point. it works perfectly. I would like to improve my setup. somebody can to say me, if it is possible to use a function that allow me to add a condition based on the last authorization of the computer. for an example, if the last authorization is superior at X days, the computer will be on another vlan. On the mysql server, the radusergroup of the user is modified. Thank for your answer Zulzig