Sharing contacts in Address Book through iCloud

Question

I work in an office where the contacts in our Address Book App. need to be shared with multiple users over multiple computers/devices. We currently have all of our contacts in the Address Book App. but whenever a new contact is added we need to physically transfer it to each machine. Ultimately, we need to accomplish 3 tasks:
1. We need to be able to create, edit, and share contacts on and between multiple computers/devices/accounts. Access is needed by all employees, including our boss.
2. Some of our contacts need to be kept private, (not shared across all machines) associated with a single account. These are our bosses private contacts that are included in the mass of our current Address Book App.
3. Do all of this in iCloud
Is it possible to share groups in Address Book over iCloud while keeping other groups private from sharing. Of course, these private entries would still need to be accessible through iCloud by our boss. I've read threads explaining that setting up a "Family Account" alongside individual accounts allows one to share contacts through the "Family Account" while keeping contacts in the individual accounts private. It seems though that this solution has its issues.
If there is an efficient and effective way of doing this, please share!
Thank you in advance!

Answer 1

If iCloud can figure this out Google is toast. Hope someone from Apple monitors these discussions.