private void OnCollisionEnter2D(Collision2D collision)
    {
                CmdChargeWave(collision.transform.position, NetID);
    }

 [Command]
    void CmdChargeWave(Vector3 HitPlace, int ownerid)
    {

        GameObject bullet = (GameObject)Instantiate(SnareWave, HitPlace, Quaternion.identity);
        bullet.transform.GetChild(0).GetComponent<SnareWave>().OwnerID = ownerid;
        NetworkServer.Spawn(bullet);

    }


/////////////////////////////////

SnareWave裡面

    [SyncVar]
    public int OwnerID = -1;