It's definitely possible to alter your perception of the world around you in a lucid dream, make it seem faster, slower, stopped. All that good stuff Bear in mind that freezing time in a lucid dream will not give you an infinite lucid

You could do it any way you want, using a remote, willing it to happen, imagining it happening, using a HUD over your face (like Iron Man?) with a slider on it that controls time. Anything you can imagine, can make it work! Be creative! Good luck!