How and where do I create a contact group to sync to. I have contacts in my address book that I do not want on my iPhone but I do use them occasionally and want to keep them on my iMac and MacBook.

I want to have a separate group of contacts for my iPhone that will update both on my iPhone and in the 'Group' on my iMac.

This must be possible somehow. Can I have a completely separate address book to serve this purpose? If so, how would I create one? If that's not the answer, and I suspect it isn't, please help.

I'm updated to the latest OS 10.7.2 Lion and have a account on iCloud