creating users per database

Hi all,

I have a faint memory of it being possible to create users
"inside" *one* given database by way of a particular "create
user" syntax along the lines of:

 create user newuser@thisdb ...;

or similar.

Was this ever possible in PostgreSQL or is my memory playing
tricks on me ? I went back through the manuals all the way
to 6.5 and searched archives.postgresql.com/Google, alas, to
no avail.

I am aware that I can (and should) restrict users to
databases by way of pg_hba and friends.

Karsten
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