Movement while using "act" commands

So on gmod, on certain servers you can move while using act commands, but on others, you can’t. What determines wether you can move or not during act commands? A cvar? some function? On my old server privider I could move while doing acts on my server but not on my new one.

Anyways, thanks in advance.

Servers can block movement using Move hooks and Player:IsPlayingTaunt()

Thank you!