So go ahead and configure each IPs to access in each connection. If there's something I can tell you is that normal user home stuff can be a pain to make it work and keep it working in this kind of configurations, and sometimes is worse to mess with the configurations, so just by connecting 2 networks 1 only will actually work for the basic use as I tried to make it clear. Don't be so aggressive with your supreme knowledge, we're all trying to help here in a forum, not a Microsoft consumer support.