[Asterisk-Users] sip.conf match

[Pepe Aracil]

Hello.

I have two hired pstn numbers with the same voip provider. 
I want to distingish in the sip.conf file, what of two phone numbers was 
dialed, but i don't know how to do the match, because the sip client and the 
sip host are the same for both numbers.
How can i match in sip.conf by the (TO: ) header in sip negotiation?

Sorry for my poor english :)

Thanks.