How to List only not started Matches in UNET lobby manager?

This is my code to list matches in lobby manager
public void listMatchh()
{
AutoMachLobby.singleton.matchMaker.ListMatches(0, 6, "auto", OnGUIMatchList);
}
This code list both started games and not started games ,I mean it lists games that are both in lobby scene and play scene.
I want to list only not started games(games in lobby scene)

 

Need to do exactly the same and don't know how. Can anyone offer a tip on this please?

 

Code (CSharp):

1. public class GameLobbyManager : NetworkLobbyManager
2. {
3.         public override void OnLobbyServerPlayersReady()
4.         {
5.             matchMaker.SetMatchAttributes(matchInfo.networkId, false, 0, OnSetMatchAttribute);
6.             ServerChangeScene(playScene);
7.         }
8. }
9.