Help: SIP Extension to choose specific ZAP channel - outgoing


Is there a way of automatically making a SIP extension always select a specific ZAP channel for outgoing calls?
Eg: Ext 5231 will always grab channel 1, Ext 5232 grabs ZAP/2, etc.

Basically I’m looking for a 1:1 relationship of SIP extension to ZAP channel. The incoming part is easily done with an Inbound Route, but it’s the outgoing that has me calling for help.