Hi James. Thanks for your interest in our iCal Importer plugin.
By default, it will import the Organizer from the iCal feed (just like Venues). However, you could add some custom code to assign imported events to a specific Organizer.
If you decide this will work for you, you can purchase iCal Importer and then open a new ticket in that forum requesting such a snippet that we should be able to help you with if you cannot figure it out yourself.
Last but not least, we have a pretty great Refund Policy so you can buy one or many of our add-ons and thoroughly test them.
Let me know if you have any follow-up questions.