Are you planning in future this feature?
All associated accounts will appear on the public cv. Only Stack Overflow accounts will appear on the private cv. This is by design at the moment.
The above was out of date. You can selectively hide account associations now.
I do have an account on all 4 trilogy sites, but I am not very active on SF and SU. I would like to be able to select which accounts are shown on the public and which are shown on the private CV.
(Not that I am ashamed of anything I do on these sites, but it does not add to my CV to show that I have 101 rep on SF.)