Use MatchMaker Tag

MatchMaker has a feature called "Tag". With MatchMaker Tag, you may target the users with the same Tag instead of all users in the Diarkis cluster.

MatchMaker Tag is useful when you need to separate groups of users as Matchmaking targets. For example, when you have multiple lobbies in your game and need to perform matchmaking within each lobby, you may use different tags per lobby to separate the matchmaking target users by their lobbies.

Use Tag As Host

MatchMaker mm = new MatchMaker();
mm.Tag = "xxxxxxx";

Use Tag As Guest

MatchMaker mm = new MatchMaker();
mm.Search(profileIDs, tag, props, joinFlag, howmany, message);