Is It Possible To Set Up A Separate VPN Network (like a guest network)???

Preface:  I am new to this.

I've been doing a lot of research on setting up my R6400 with PIA.  I've sucessfully flashed my router with Tomato and once again have access to the internet (it was a little hairy there for a while).  My question is: Can I set up my router to have a separate wireless network that directs all traffic through my VPN?  I've found one solution that allows me to run all traffic through the network and one that allows me to run specific devices throught the network.  I want to create a separate network (like a guest network) that I can just hop on from any device when I need the VPN.  I'd prefer not to have to buy a separate router.  This seems like a no brainer to me, but I haven't been able to find what I'm looking for online.  I'll keep researching and update this with whatever solutions I find but any help would be greatly appreciated.