threads and libpq

from the Postgres Architectural Concepts document:

"The libpq library allows a single frontend to make multiple connections
to backend processes.
However, the frontend application is still a single-threaded process."

could some clarify to me if this means that a frontend CANNOT open
several
connections from different threads with the current implementation of
libpq.

if so then what does it mean "to make multiple connections" ? does this
apply only to multiple processes ? or from the same process but not at
the same time ?

Is there anyone working on multi threading for libpq ?

best regards,

--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
David O'Farrell AerSoft Limited
mailto:dave(dot)ofarrell(at)aersoft(dot)ie 2 Northumberland Avenue,
Dun Laoghaire,Co. Dublin
Direct Phone 353-1-2145950
Phone: 01-2301166 Fax: 01-2301167
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~