postgres what information is stored for a connection

Looking to find more connection information that PostgreSQL stores.

I did find these queries:

SELECT datname, numbackends 
FROM pg_stat_database
WHERE numbackends > 0
ORDER BY numbackends DESC, datname

SELECT datname, COUNT(*) AS numbackends
FROM pg_stat_activity 
GROUP BY datname HAVING COUNT(*) > 0

But I'm looking to find out wha开发者_开发百科t script(s) or IP's are connecting or have current connections to PostgreSQL, is there anything that captures this information?

NOTE: Turning Logging on is not the solution I'm looking for, more of a on the fly report I can filter by the script or IP connecting to the database

Postgres version 7.4

The IP address of the connected clients is also recorded in pg_stat_activity, just as the currently running statement (if any)

SELECT usename, 
       application_name, -- only valid for 9.x 
       client_addr, 
       backend_start,
       query_start,
       current_query
FROM pg_stat_activity