Mailman in a virtual hosting environment

I'm using the virtual mail and web hosting built into Mac OS X Server. Using Server Admin it seems to only allow you to create mailing lists for your default mailhost. How would you configure Mac OS X Server to allow lists for each virtual host? I did this successfully once on a gentoo system and telling Postfix to read the alias information from a table in a MySQL database. Is this the route I should go on OS X? Where are the Mailman files found... I see /var/mailman, but there must be more. Thanks for your help!