It is possible to lock the LP in place, however, it may depend on the specific type of LP that you have. If you have an LP with a locking mechanism, then you can simply use that to secure it in place. If not, then you may need to find another way to secure it, such as using a bracket or clamp to hold it in place. It is important to make sure that the LP is secure and does not move when playing, as this can cause damage to both the record and the player.