IPhone to OS X VPN "Bridging"?

Does anyone know of a VPN type solution to my problem…

So at work the Wi-Fi and ethernet LAN’s are on different subnets, and I want a way to be able to use Airplay on my iPhone (Wi-Fi) to my Mac on the ethernet subnet.

It works fine if I have another Mac hooked up to the ethernet LAN, but no go for anything on wifi.

I’m looking for some sort of VPN Client & Server setup that I can use to have the Airplay broadcast packets cross the routers/subnets from my iPhone to my mac.

What do you guys & gals suggest?