Yes, but it may not be a feature in the first beta release.
Glasswire looks to be promising (perhaps in time) for Windows users, macOS already has Little Snitch that I am quite fond of.
Investing in Linux is bad idea, with 1% market share but more expensive development than Mac.I think you should focus in Windows and Android. Mac also a good idea bcus more people use Mac and they are more likely to pay the software.
Mac will come out first. If we made something for Linux it would probably be a command line agent at first.
Yup, command line is better idea since it's more reliable in linux to develop.
but still, i think Mac will bring more money and reputation to your company than linux.