[HowTo] Permanent NordVPN tunnel on OSMC

@chojin thanks for this guide!
Just one question: what if I don’t want Kodi (and its add-ons, for example BBC etc) to go through the tunnel? Or the other way around: only have Kodi go through the tunnel.
What if I only want apps like rTorrent/Transmission/Flexget to go through the tunnel?
I have tried playing with network namespaces but it’s way over my head:

Also, there is another approach that I didn’t fully understand:
https://community.openvpn.net/openvpn/wiki/IgnoreRedirectGateway

Perhaps this is something that could work in combination with your solution?