Events have a new privacy setting called "Private - Tag Specific." Configuring "Private - Tag Specific" and selecting the specific tag(s) will ensure the particular event is only visible to users who were tagged to have met certain requirement(s).
To use this feature, you must first have tags configured, and you must also have tagged your users to indicate that this user has met a certain user requirement. Tag a user on Manage Users by selecting the relevant user record and go to Bulk Action > Tag Records. As an example, an admin can tag users who have attended an event called Cat Sitting Training as "Cat Sitter."
Subsequently, when an admin creates an event that only cat sitters should see, they will choose "Private - Tag Specific" as the Privacy Level, and press "Click to add Tag(s)" to select "Cat Sitter." Selecting multiple tags for this privacy setting means users who have any of the selected user tags will be able to see the event on the Group Page and on Get Involved. Users who do not have any of the selected user tags will not be able to see the event.