[Help!] Showing only your health in a Multiplayer FPS game

So I have an extremely basic Multiplayer FPS game working using Unity's native networking features. I have a health bar show up at the top of the screen using this:

void OnGUI(){ GUI.Box (new Rect (10, 10, 100, 30), "HP | " + currentHealth); }

The problem with this is when I have one player shoot another, I shows both health bars at once, on over another. How can I have the player only see their health and not the other player's health?