Helen (Katey Sagal) was a member of the group; another woman (Jeannie Leigh Allison) was the "moderator". Helen spoke to Locke for the first time outside the meeting, commenting about his failed attempt to light a cigarette. The confusion might come from Locke's calling it "your meeting": 
 HELEN: Probably a good idea. You know if you get kidney cancer you've only got one. 

 LOCKE: That's funny. I'm sorry if I ruined your meeting. 

 HELEN: Oh hell, you just said everything I've always wanted to say in there. Most of the time I want to stand up and scream: get over it, freaks. 
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