LibreELEC.tv/package.mk at master · LibreELEC/LibreELEC.tv · GitHub
^ that's what it contains. Devs generally have no objections to adding other binaries to the tools package, but it's up to the people that want something added to test and submit the required/desired changes. As a broad rule we'd also want to focus on things that have a use case beyond one person. I think this is the first post to mention RADIUS in the 7+ years I've been hanging around LE/OE etc.
I'll also pass the general comment that if you want a router/firewall distro .. use a router/firewall distro. LE is neither.