I have recently installed iCagenda Pro and am able to create and edit events for a number of categories, both as administrator/super-user (from front and back end of the website) and as an Event administrator (from the front end). I have set up an Event administrator role that can update ALL events but I have also been able to restrict the events to those that the Event administrator themselves created. 
I have a number of categories of events, arranged by location, so for instance, one category is in Town A, another category is in Town B, one is at National level, etc. 
I would like to be able to give the Event administrator based in Town A the ability to create AND edit ALL events in Town A (ie the category that represents Town A), whether they themselves have created them (some events might have been created by a super user or similar role who has overall view of and access to the events and the calendar), but deny access to edit any events created in Town B. Similarly the Event administrator in Town B should only be able to edit events in Town (Category) B, whether they had created it themselves or not. In all cases, the National level event administrator should be able to create ANY event by default, irrespective of location or category. (This, of course, is what the basic Event administrator role can do)
Is this possible? If so, how do I set up the roles/access permissions, etc. If it is possible, then that would make the functionality of the extension perfect!
Thanks for your help
Peter Robinson
Society for the Study of Egyptian Antiquities (SSEA), Toronto
 

Thank you, Cyril. The intention is to have the 'event managers' only access the creation / editing of [category] events from the front end. I now have the website up on a temporary URL (it's going to replace our current Joomla 3 version site on the same host, but I haven't yet gone through User Acceptance Testing with some of our members, so it doesn't yet have the correct URL). I will send you a private message with some log-in details and link, just in case itcan be done (or to inspire you for a future upgrade).
Thank you again for this
Peter