RT-AC68u VPN for a specific source ip

Hi,

I'd like to setup the ac68u to automatically route all traffic from a specific ip on my network through a vpn. Is that possible?

I'm asking this because I'm hesitating between the ac66u and ac68u and this would be the one feature that would make me decide to go with the ac68u since with it's more powerful processor the throughput when connecting through a VPN should be much faster than the ac66u

Cheers