Problem:
The system.profile collection contains information about slow operations. This needs to be extended to include the username that the connection authorized with via the db.auth() command.

Use Case:
> use test
> db.setProfilingLevel(2);
> db.auth("thetest","xxx")
> db.foo.save(

);
> db.foo.find();
> db.system.profile.find(

)

This final command show just the commands executed by the user "thetest"