Players = Players.OrderBy(P => P.ID).ToList();

Lock(Players[0].LockObj)
    Lock(Players[1].LockObj)
        Lock(Players[2].LockObj)
            Lock(Players[3].LockObj)
                Lock(Players[4].LockObj)
                    Lock(Players[5].LockObj)
                    {
                        //...
                    }