Blocking apps from anothers users view and opening

Is there a way to block certain apps from the view of a non Admin user?, not just hide them but make it impossible for them to be seen or opened even from command line

I found a thread here on Askubuntu…

Proceed at your own risk! Be sure to back everything up before attempting! Good luck!

thanks I’ve seen that before but had not thought about it, I’m not entirely sure if that is what I’m looking for, but it may work