[mamorunl]

pawn Код:

new playerOnDuty[MAX_PLAYERS]; // global outside any callback

// Connect initializes variable:
OnPlayerConnect(playerid) {
playerOnDuty[playerid] = 0;
}

// Command sets player OnDuty
OnPlayerCommandText() {
    if(!strcmp("/onduty", cmdtext)) { 
        playerOnDuty[playerid] = 1;
        return 1;
    }

// in a command that can only be used while on duty:
    if(!strcmp("/kick", cmdtext))
    {
        if(playerOnDuty[playerid] == 1) // can use
        else SendClientMessage(playerid, COLOR_GRAD1, "You are not Admin On Duty!");
    }
}

This code is purly for educational use and needs to be implemented rather than copy-paste. It give you a global overview of how it is done.