It seems like this function should just be built in to the DE's, like windows (does mac have this too?). i guess doing it manually with (g)ufw isn't too hard, b

It seems like this function should just be built in to the DE's, like windows (does mac have this too?). i guess doing it manually with (g)ufw isn't too hard, but it's another one of those things that i can't teach my parents. btw, does anyone recognize the wm/theme in the screenshot?