Incredible. LittleSnitch is must-have for macOS and trying to get equivalent functionality on Linux was painful. So very happy to see this, and very happy to give the developers at Objective Development my money.
In linux, I trust most distro apps to run with network access without any sort of firewall. And for apps from internet, just put them in bubblewrap or run with flatpak without access to homedir, network, audio, video etc. depending on program.
