Isolate WWAN and WIFI connections

Hi. Just registered on this site and couldn't quickly find any thread covering this, so wondering if anyone can help...

Does anyone know of a connection manager (type) software that can be used to isolate traffic from WWAN or WIFI?

Reason I ask is because if you have an aircard and connect to your ISP, and then go home and pickup your wireless network - you'd find that you have 2 concurrent connections - and IP on each interface. I need to ensure that no matter what - each interface is isolated from one another.

Ideally - I'd like software that would disable WIFI when the aircard is plugged in, and then re-enable it when it's removed.

AirSafe does something similar for Ethernet & WiFi - but so far I've found nothing effective for WiFi and WWAN.

Any ideas??

Thanks!