[Last_Stand_Guardian]

pawn Код:

public OnPlayerStateChange(playerid,newstate,oldstate)
{
       if(newstate == PLAYER_STATE_DRIVER)
       {
            new Name[MAX_PLAYER_NAME];
            GetPlayerName(playerid, Name, MAX_PLAYER_NAME);
            if(!strcmp(DynamicCars[GetPlayerVehicleID(playerid)][Owner], Name, false)) { }
            else RemovePlayerFromVehicle(playerid);
       }
       return 1;
}

I don't know the dynamic car-system, so I don't know if this will work, but:
You should use strcmp to check if two strings are equal or not
=D