[Dovecot] imapc / namespace question

Hi,

I've got two questions regarding imapc and namespaces:

1. Is there a way of stating, that I only want part of the hierarchy on the end of an imapc connection to be available here? My "problem":

On the other end the layout is:

INBOX.Shared.{some,nice,folders}

If I mirror this into my dovecot hierarchy with prefix "Gemeinsam" I get the following folder structure:

Gemeinsam.INBOX.Shared.{some,nice,folders}

But I want to ignore the two top-most parts of the hierarchy, i.e. I want it to look:

Gemeinsam.{some,nice,folders}

Is this possible? I tried with 'location=imapc:INBOX.Shared.' but this did not change anything.

2. "Private" namespaces only make sense, if location contains something user-specific like "%u" or "~". Is this correct? If yes: Is there some other way to make something like an imapc connection only appear for one user, if there is nothing in the location or imapc_user to denote the user it belongs to and hence I cannot use "private"? The only way I see currently is to use "shared" and set up ACLs to forbid all users except one to access the namespace (which gets slightly ugly as I have to use global ACLs, as -- I think -- there is no way to store ACLs for an imapc storage).

Thanks, René