[asterisk-users] route based from source

[Nhadie]

Hi,

Is it possible to detect where the call came from and route it out to 
different sip trunks.

e.g.

i have user 100300 when that user calls outbound i will make him use of 
[sip-trunk-100]

another user, 101300 when that users calls outbound i will make him use 
of [sip-trunk-101]

actually the 100 and 101 at the beginning of the username is the 
accountcode i used for cdr.

hope my question was clear enough. thanks in advanced

regards,
nhadie