Specify parent interface for wireguard tunnel?

[q54e3w]

I have two WAN connections and would like to setup two wireguard tunnels, one over each. There was a way using OpenVPN to specify which connection the VPN should be created over but don't see how to do this with wireguard. Is this possible?

WAN-Primary > Wireguard primary
WAN-Secondary > Wireguard secondary