Attaching the player to an entity

[BobTheFish]

i am trying to limit a players movement by using a rope to tie them to something. is there any simple way to attach a player to a move_rope entity, so that they can move around until the rope becomes taut, and then not move any further away?

i realise that this may be quite a lot to ask, if it is very complex let me know and give me some pointers for where to look in the sdk.

thanks