Limit Manage Registrants page by category

Hi

We have two categories of events managed by different administrators. Would it be possible to add a category filter in the menu configuration for Manage Registrants? That way each administrator would only see their own registrants.

Best regards
Trevor

I came here for a similar request., I'd also like to see the a date option, just like the Default Duration Filter in Upcoming Events but also the option for a number of days in the future, as I have 9 events every day and the registrants list is very big.