Now before anyone suggests that I create a “top-level” server in the form of a sub-server, I’d like to make sure that you know that while this will solve the alternate username/password issue, but will also end up creating a second, third, fourth, etc zone file which will not work with my DNS setup.
If you can take care of the secondary issue, then I’m open to using a “top-level” server for each sub-domain.
There isn’t a way to create a new admin user for a Sub-Server. Admin users are for the top-level Virtual Server, and all Sub-Servers.
You could, however, create a new FTP account for each Virtual Server or Sub-Server – would that do what you’re after? You could go into Edit Mail and FTP Users, and click “Add a website FTP access user.”
And those FTP users can even have SSH access, if you give them the proper login shell (after potentially activating it in the system customization settings).
What you cannot change is that the administrative user of the parent domain will have access to the sub-domain directories. This is necessary at least if you operate Apache in FCGI mode, since the sub-servers run under the parent’s user then.
About that zone file issue though: why can’t you have more than one zone file? It’s a bit hard to offer ideas for fixing an issue without knowing why it exists.
