dual-vpn

Hi, I'm running on AsusMerlin 380.64_2 on my RT-AC3100 router. I have setup OpenVPN client and things are dandy. But I am trying to setup the router in a way that only certain IPs go thru VPN while the other IPs can go unencrypted. For e.g. my desktop, NAS, Laptop, Tablets, Home Automation...