Secure Repositories by User in Mercurial

I have followed the many helpful ideas presented in this SO question. Now the last thing I'm wrestling with is how to allow certain people to access and view the contents of certain repositories. I want to have a ce开发者_开发知识库ntral Repos folder on my machine, where all Hg Repos will live, but I would like to say that Person X can see Repos A, B and C while Person Y can only see A & C. I have not been able to find the answer to this question and I hoped that someone on SO could assist me. I can control the push/pull, but I haven't seen a way to actually prevent repos from being visible in the hgwebdir CGI application.

Use the ACL Extension (distributed with Mercurial).