[Marcel]

pawn Код:

public OnPlayerEnterVehicle(playerid, vehicleid, ispassenger)
{
    new pName[MAX_PLAYER_NAME];
    GetPlayerName (playerid, pName, sizeof (pName));
    if (strcmp (Carlist[playerid][owner], pName, true) == 0)
    {
        // It is true
    }
    else
    {
        // Not true.
    }
    return 1;
}

By the way, I think it is Carlist[vehicleid] instead of Carlist[playerid].