[Asterisk-Users] Different EXT lines for different users?

[Alen Salamun]

Hello!

I would like to make asterisk to use different ISDN external lines 
dependant on which internal user makes the call. Right now I have 
(12345678 represents my MSN):

[pstn] ; ISDN to PSTN 

exten => _0.,1,Dial(CAPI/12345678:b${EXTEN:1}) 

exten => _0.,2,Hangup

This ofcourse means that whenever someone call's out to number 0....this 
call goes to outside line 12345678.

Now i would like asterisk to behave like that:

When user 100 calls go outside on line 12345670
When user 101 calls go outside on line 12345671
...

How can I do that?

Thank you,
Alen