i cant do it myself, but when i see players like froggen play her, what they do is abuse how her wall makes u autopath and use that as a form of hard CC..
walling someone will not cancel their movement command, it will reroute thier path, that is 100% instantaneous and server side, by the time they as a player a see the movement change respond and their command is sent back to the server to issue a new movement command... its normally too late to save them if u put the wall in the correct spot.
wall them to re-route their path to make them wrong into the exact area they DON'T want to go.
thats how froggen does it anyways.