VPN configuration on Only 5GHz Radio not 2.4GHz

How i can configure the OpenVPN on 5GHz radio.I want send normal packet via 2.4GHz and VPN packet over 5GHz. Does it possible on one Router ...

Yes, both wireless radios/ interfaces can be configured individually - you merely need to move the bridge from LAN to your VPN interface.

Please Can you elaborate more on this ....how i configure radios individually and move the bridge from LAN to VPN interface..or you also can refer any kind of example that will be appreciated..