A few questions for hashover

I am testing hashover locally, and i have a few questions if you can help me out,
I would like to allow only registered users to post comments,

public $defaultName = 'Test'; // Default name to use when one isn't given

How can i use session data for this variable?

How can i run the admin to moderate the comments, for default there is no moderation right? how can i change this?

I have differents details pages for differents products in a store, but the comments are the same in each
page, how can i change this?

Thanks in advance.

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