@khurtwilliams Thank you for your reply!

I know I cannot use iCloud for this. But I still don't know how to configure this in the Address Book preferences. To clear things up a bit I made two screenshots and hope you now understand my problem. 🙂

http://cl.ly/1v0m3c2U1z2p1Z462B3O

http://cl.ly/3y1H0v1Q3D3S1H3P2u2a

I'd be happy if you still can help. Thanks a lot!