Hiding databases - Mailing list pgsql-general

Hello,

is it somehow possible to hide databases from users?

Example:
I am user postgres1 and I created a database 'pg1db' with owner postgres1.

I log into phppgadmin as user postgres2, and I can see pg1db in the
list. But I don't want to, I want pg1db to be private for user
postgres1, so no one else is allowed to see it.
Is it possible?

Thanks, Martin