f you want to play with your friends only or if you want to boots. ITS SOO EASY.. 4 steps thats all..

Steps
1.Search for free for all and invite 3 or more player
2.once all players have joined because your the host you back out
3.Someone needs to invite you back to the game before the match starts once you get invite join quick
4.Now your lobby is locked and its invite only


Now You Can Boost with your buddies. or quick scope online.. whatever you want :D