[dev] Separate DataTree instances?

[Mike Dorman]

Is it possible to have separate DataTree instances in a single Horde  
installation?

What I need is separation between each virtual host domain on my  
system.  E.g. a set of permissions, ansel albums, etc. for  
domain1.com which is completely isolated from domain2.com.

The only way I can really see to do this is to use separate datatree  
DB tables for each domain.

Is there a cleaner/easier way?

Thanks,
Mike