Regardless of whether this is MP related or not, here is the answer in SQS format This should be inserted into the init.sqs if you have one, or should make one from it. If you want to use SQF you can, but it's not vital for this particular exercise. If you have an init.sqf, then the code will obviously need changing to the sqf syntax.
?side player==west:goto "WEST"
?side player==east:goto "EAST"
#EAST
;;Hide West markers from East players
"MarkernameyouwanthidingfromEast" setmarkertype "empty"
goto "NEXT"
#WEST
;;Hide East markers from West players
"MarkernameyouwanthidingfromWest" setmarkertype "empty"
SQF format would be
switch (side player) do
{
case "East":
{"MarkernameyouwanthidingfromEast" setmarkertype "empty";
};
case "West":
{"MarkernameyouwanthidingfromWest" setmarkertype "empty";
};
};
That should work for you.