The tooltip seems to imply that it does route all packets, even non-OSC ones:
But in practice, I'm seeing an incoming ICMP ping coming in the input side but not going out the output side. - I see the little white icon light up every time the ping comes in, but the output side doesn't light up and the packet is not being forwarded.
Bump bump bump
OSCRouter is an unofficial open-source software that is supported entirely on the GitHub page linked at the top of this post. Please direct all issues and questions there.