[Konstantinos]

Do you mean to check in the callback if the variable for that player is 1 or 0? It's indeed possible and pretty much that's what arrays are for.

In a callback with "playerid" parameter you want to check when it's called:

pawn Код:

if (Variable[playerid] == 0)
{
}

OR:

pawn Код:

if (Variable[playerid] == 1)
{
}