Read the statement by Michael Teeuw here.
UNSOLVED Calendar (native) Profiles option
I really like the way the standard calendar module looks vs a 3rd party like CalendarExt but was looking for a way to implement different calendars based on facial rec user. I see a few of the others support a profiles:  addition but didn’t see anything like it documented to the standard calendar. Can I just configure two calendar module sections with different classes (multiuser) and show one or the other? Or does someone have some css that makes the CalendarExt module look more like the standard (black and white with no frills)?
Never mind, I just tried creating two module configs with different classes and that worked (can have more than one calendar module defined).