Share Forticlient from wireless to ethernet

I have an IP Phone that I wan to connect to the ethernet port on my iMac. I have installed the FortiClient (running SSL mode) to connect to my office. I connect the iMac to my router via Wireless. I want the VPN to be shared to the ethernet port.

Is this possible? So far the IP phone does not register to the Asterisk server when trying this. How can this be done?