Multi-player Moving Script Help

Hi. I'm going to get straight to the point. I've been working on a multi-player game, and I got the server to work and everything. But I can't seem to figure out how to get the character to follow the actual character's direction it is pointing. All I can get is w is forward, a is left, s is back, and d is right. I have added the sample mouse look script, so all I need help with is how to get the movement follow the way the camera is pointing. Here is the code:

 using UnityEngine;
 using System.Collections;
 
 public class Player : MonoBehaviour
 {
     public float speed = 10f;
     public float rotateSpeed = 10f;
 
     private float lastSynchronizationTime = 0f;
     private float syncDelay = 0f;
     private float syncTime = 0f;
     private Vector3 syncStartPosition = Vector3.zero;
     private Vector3 syncEndPosition = Vector3.zero;
 
     void OnSerializeNetworkView(BitStream stream, NetworkMessageInfo info)
     {
         Vector3 syncPosition = Vector3.zero;
         Vector3 syncVelocity = Vector3.zero;
         if (stream.isWriting)
         {
             syncPosition = rigidbody.position;
             stream.Serialize(ref syncPosition);
 
             syncPosition = rigidbody.velocity;
             stream.Serialize(ref syncVelocity);
         }
         else
         {
             stream.Serialize(ref syncPosition);
             stream.Serialize(ref syncVelocity);
 
             syncTime = 0f;
             syncDelay = Time.time - lastSynchronizationTime;
             lastSynchronizationTime = Time.time;
 
             syncEndPosition = syncPosition + syncVelocity * syncDelay;
             syncStartPosition = rigidbody.position;
         }
     }
 
     void Awake()
     {
         lastSynchronizationTime = Time.time;
     }
 
     void Update()
     {
         if (networkView.isMine)
         {
             InputMovement();
             InputColorChange();
         }
         else
         {
             SyncedMovement();
         }
     }
 
 
     private void InputMovement()
     {
         if (Input.GetKey(KeyCode.W))
             rigidbody.MovePosition(rigidbody.position + Vector3.forward * speed * Time.deltaTime);
 
         if (Input.GetKey(KeyCode.S))
             rigidbody.MovePosition(rigidbody.position - Vector3.forward * speed * Time.deltaTime);
 
         if (Input.GetKey(KeyCode.D))
             rigidbody.MovePosition(rigidbody.position + Vector3.right * speed * Time.deltaTime);
 
         if (Input.GetKey(KeyCode.A))
               rigidbody.MovePosition(rigidbody.position - Vector3.right * speed * Time.deltaTime);
     
     }
 
     private void SyncedMovement()
     {
         syncTime += Time.deltaTime;
 
         rigidbody.position = Vector3.Lerp(syncStartPosition, syncEndPosition, syncTime / syncDelay);
     }
 
 
     private void InputColorChange()
     {
         if (Input.GetKeyDown(KeyCode.R))
             ChangeColorTo(new Vector3(Random.Range(0f, 1f), Random.Range(0f, 1f), Random.Range(0f, 1f)));
     }
 
     [RPC] void ChangeColorTo(Vector3 color)
     {
         renderer.material.color = new Color(color.x, color.y, color.z, 1f);
 
         if (networkView.isMine)
             networkView.RPC("ChangeColorTo", RPCMode.OthersBuffered, color);
     }
 }

Please help! Any feedback will be greatly appreciated!