Another access control query

Hello,

Similar to other questions I've seen posed in the last day or so,
apologies if this exact question has been asked, I don't think it has.

I want to restrict access to a set of databases to connections from a
specfic machine and a specific user.

Lines in my pg_hba.conf file are similar to this:

host db1 serverip netmask password

Effectively what I want to do is have something like:

host db1 username1 serverip netmask password
host db2 username2 serverip netmask password

thereby ensuring that it is not possible for user2 to connect to db1 from
the same machine.

I know I can set up the different db's so that table security only gives
any access to the user I want, but that is fiddly. Being able to do the
above and prevent connections to the database will resolve that issue.

Any ideas?

Regards,

Mark.
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Mark Jewiss
Knowledge Matters Limited
http://www.knowledge.com