asterisk users - Nov 2006 - Binding a peer context to a specific IP address

Hello,

I was wondering if it's possible to set a specific sip/iax peer context 
with a certain IP addresses, so Asterisk will bind itself and connect to 
the peer only using a specific IP addresses. That way, Asterisk will use 
different IP addresses for different contexts (and making it easier for 
me to take advantage of gre tunnels/multi-homing).

If not, does anyone have any idea how can I have certain contexts binded 
to certain IP addresses? Proxies? anything?


Thanks, Tomer.