How to block one display out of two?

Question

linux

Good evening. Is it possible to somehow set up a screen lock in which only one of the two displays will be locked? or two out of three? I tried i3lock, xlock, but I managed to do what I needed.
If this is not possible, then perhaps there is another way when leaving work, to leave one monitor active with open windows (at least just for viewing, for example, logs), and make the second one inactive (no one sees and cannot do anything), hang on him a splash screen that can not be removed or something like that?
Thanks in advance for your replies

Answer 1

Maybe I'm not quite right, let me be corrected, but all your monitors are processed by one X server, and lockers block exactly X. As an alternative, you can run 3 independent X on three different displays, and fool around with transferring applications from one X in another. Well, or use something like Synergy

Answer 2

In the general case, the problem is not solved, but you can add a device that will display the contents of the screen via VNC (or any other) protocol in view only mode.