In order to answer this question and provide the full details, we'd like you to create a case in your secure customer space. That way we can engage the correct resources specific to your instance.
Let me know if you experience any issues doing so.
other people want to know the answer to this question.... like me! is it really so secret? what does "online users only" filter mean and how acurrate is it?
There is a current bug with this, and as a result it is being pulled from the platform (instead of fixed) in 7.0.3 and later. Here is an idea I made to have it added back into a future version. Please go vote it up: Bring back the "show online users only" filter