[Freeswitch-dev] limit call on trunks based on call count

Hi Guys, Freeswitch Rocks! I would need to limit calls on outgoing profiles, eg. use maximum 2 calls on profile#1, if call count reached then use profile#2. In Asterisk I used Group()=trunk#1 and GROUP_COUNT(trunk#1) to achive this but cannot find any usefull hint how to do this using Freeswitch... Please advise...