Secondary IP on MAC Book Wifi

I use many vm’s in my day to day on my Mac. When I’m on clients and I have to use different networks of my other, always have to be changing the ip’s of virtual servers and this is a big problem.

A friend sent me the following tip : Place a secondary ip in your MAC that belongs to the same network of VM’s.

I don’t find a easy way to put a secondary ip on my wifi connection. The only way i found was duplicating the wifi network and set up fixed ip in the same network of virtual machines .

Now i can connect on any wifi network and my Mac access all vm’s without changing the ip address