Bind to other NIC rather then wifi

Trying out Airdroid, and I cannot get it to work. I guess that it is because my setup is a bit weird.
When on WIFI, my Android is accessing the net through VPN. IT seems that AirDriod binds to the WiFi reather than on the VPN interface which I guess is why I cannot connect.

Can I force AirDroid to bind to the Wifi address?

Regards, Lars.