Multiple Lobby or Lobby Filter

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Hi, i had wrote game like rummy game with Photonengine. But i used my own server for main lobby , some rooms for city and lists of playable rooms. İ only used Pun for when playing. So i have some problems.

i want to ask somethings

1. How can i create lobby filters. ( i look some questions on this forum . but i dont learn enough information.)
2. How can i learn players count in lobbies . ( when i use filters this is not problem )
3. how can i list players of in lobby with their information.

if you want to see my game. Click here my okey game

sorry for my engilsh and thanks for your helps.