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,


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  David O'Farrell                              AerSoft Limited
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