Amber feature question

Hello,

I have just been looking into using Amber as a persistence library.
There is however one feature that I would like to have that has not been 
provided for in the JPA standard.
I would like the ability to store an Entity into a table which I supply the 
name for at the time of storing the object.
In other words I want to be able to dynamicly determine the table an Entity 
has to be stored in.
The reason I need this is to be able to split giant table up into seperate 
domains. The different domains have no shared data and can therefore safely 
be split into multiple tables, no queries are performed that span multiples 
of these tables.

Is there allready a way to simply do this? If not, how do I create this?

With regards,
Peter Havelaar