I'm trying to figure out how to set user specific shares in beta4. The only thing I can find that's remotely closs is "allowed hosts" where I can set IP access, but not user accounts access. am I fully retarded or is it not implemented yet?
Typically you set user access at the storage level. You can either add users to groups and assign the group permission to a volume or create datasets and assign each user their own dataset. See the section on FTP in the documentation for some examples of both.