Codigo del Objeto "Cliente":

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Networking;
public class PlayerObejct : NetworkBehaviour {

    public GameObject playerPrefab;
    GameObject myPlayerUnit;
    [SyncVar(hook = "OnPlayerNameChanged")]
    public string playerName = "Anonymous";
    public Vector3 spawnPosition;
    public Image hpBar;

    // Use this for initialization
    void Start () {
        if (!isLocalPlayer)
            return;
        CmdCheckPlayer();
	}

	// Update is called once per frame
	void Update () {
        if (!isLocalPlayer)
            return;
        if (gameObject.name != playerName)
        {
            gameObject.name = playerName;
        }

    }

    void OnPlayerNameChanged(string newName)
    {
        gameObject.name = newName;
        playerName = newName;
    }

    [Command]
    void CmdSpawnMyUnit(Vector3 t)
    {

        GameObject go = Instantiate(playerPrefab);
        myPlayerUnit = go;
        myPlayerUnit.transform.position = t;
        myPlayerUnit.GetComponent<PlayerUnit>().creatorName=gameObject.name;
        NetworkServer.SpawnWithClientAuthority(go, connectionToClient);

    }

    [Command]
    void CmdChangePlayerName(string n)
    {
        playerName = n;

    }

    [Command]
    void CmdCheckPlayer()
    {
        if (!GameObject.Find("Player1"))
        {
            CmdChangePlayerName("Player1");
            spawnPosition = new Vector3(4.27f, 0, -4.51f);
            hpBar = GameObject.Find("Player1Bar").GetComponent<Image>();
        }
        else
        {
            CmdChangePlayerName("Player2");
            spawnPosition = new Vector3(-4.07f, 0, -4.51f);
            hpBar = GameObject.Find("Player2Bar").GetComponent<Image>();
        }
        CmdSpawnMyUnit(spawnPosition);
    }

}

Codigo de la Instancia del "Cliente":

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Networking;

public class PlayerUnit : NetworkBehaviour {

    public string creatorName;

	// Use this for initialization
	void Start () {

	}

	// Update is called once per frame
	void Update () {

        if (!hasAuthority)
        {
            return;
        }

        if (Input.GetKeyDown(KeyCode.Space))
        {

        }

    }

    [Command]
    void CmdDealDmg()
    {
       // Funcion para hacer daño al otro;
    }

}