Direct access from virtualbox machine to wlan?

"VirtualBox does not support pass-through interface for PCI devices. Even if it did, you could not use it in both host and guest at same time. I am not aware of virtualization product that supports that currently.

What could work is if you have USB Wireless card since USB pass-through interface is supported. That way you could connect to one router through your PCI card and to other through USB."