In the current version, it would be possible to store the meta data you want in [font=courier new]Home.xml[/font] file with [font=courier new]<property name="..." value="..."/>[/font] elements added to [font=courier new]<home>[/font] root element (or possibly to [font=courier new]<compass>[/font] element). I used this kind of properties to store copyrights and other information in Sweet Home 3D demos like in Studio.xml.

These values can be set / retrieved by program with the [font=courier new]setProperty[/font], [font=courier new]getProperty[/font], [font=courier new]getPropertyNames[/font] methods in Home class (available also in JavaScript Home class). But there's no user interface to set and display them yet.
In a way, I'm astonished that this kind of feature request doesn't appear more often, especially from professional users.