I meant Egress-gateways, sorry for the confusion 😅 . My understanding is that you can add 1 egress-gateway to a node, where it is only possible to assign 1 or more network-ranges to 1 interface.
In some cases we have multiple network-interfaces connected to 1 vpn node, and would like to assign these multiple interfaces to the VPN-network without using mesh-networking. This is due to some limitation we found where client isolation on mesh-networks is quite hard to do.