Is there a way in CUCM6.1 to restrict particular users to only dial certain International countries(AUS,CAN,UK) while a the same time allowing others who have International CMC access to dial all International countries?
Yes, CSS and partitions.
Create the AUS, CAN, UK route patterns in a different partition and assign that to the users who should only call those countries.
For all other users maybe just a 9011! with CMC enabled in other partition to which above users do not have access.
if this helps, please rate