Lock down access to calendar events by owner

[arvobowen]

Is it possible to lock down a created event by chance?

For example:
I have 4 users... User1, User2, User3, and User4.
User1 creates an event and sets the participant's to User3, and User4. (NOT User1 - that user just created the event but still would have access)
I want User1, User3, and User4 to be able to edit the event but only allow User2 to see the event but NOT allow access to change the event by User2.

Is that possible?