Little Snitch Request

Project information:Little Snitch informs you whenever a program attempts to establish an outgoing Internet connection. You can allow or deny these connections, or define rules to handle future attempts automatically. Little Snitch reliably prevents your private data from being sent out to the Internet without your knowledge.

Name:Little Snitch
Homepage:Download – Little Snitch for Linux
License: Proprietary
Upstream has been contacted:No

As far as I can see this requires a kernel module to function. This would be imcompatible with Flatpak.