[Freeswitch-users] Time limit

Hi everyone, is posible use call limite for calls, to some extensiones? In Asterisk is possible creating custom context with set time limit to specific trunk, but i see that Freeswitch is more stable code, i need to know if is possible create groups for limit calls and assign extensiones to that group, if is possible, how i do that, thank´s. -- Juan Carlos Gonzalez C.