Is there any way to lock turns?

Is there any way to make it so players can only move on their own turns?

This I am also trying to figure out

Currently, there is no way to directly lock tokens from moving. However, there are a couple ways to prevent players from moving but neither are very satisfactory solutions: 1) Move the player token to the map layer. You will have to move it back to the token layer when their turn comes up. 2) Remove player control permission from the player token so that they cannot move it. You will have to restore player control permission when their turn comes up. - Gauss

Is there any way to stop them from moving through walls?

Raymond, not at this time. You could use Fog of War to prevent them from seeing into the next room if they move the mini into it. Then they can move through walls and they will not see anything. If you are concerned about them seeing a monster after they have explored the room you could place monsters on the GM layer until the players can see it. Then move the monster to the Token layer. - Gauss