[GRASSLIST:9196] Using different layers in v.digit

Dear GRASSusers,

what's the way to assign digitized objects to different layers in v.digit
(dbf files)?
Is it possible to specify different layers in the same table or a table for
each layer must be created, and in which way?

Or may be dbf files don't allow multilayered features?

Many thanks in advance

Aldo Clerici