Opening, on one client, two projects that are on separate networks

I have two applications I would like to open on the same client. One application is on the local gateway and the other is on the remote. I have two NICs installed on the client with addressing based off of the two networks. However, when I try to open the remote application, it wants to use the NIC attached to the local network.

I think what I am doing can be done, just missing a step somewhere.

Routing rules on the network interfaces. If both interfaces can route to remote subnets, you will need custom routing rules.

{ This is purely a network configuration issue, not an Ignition issue. }

Thank you. I will look into that.