Granular privacy with services?

I may be missing something (I hope) but is it possible to set granular privacy on the services just as you can with the "Where I Am on the Web" settings?

For example, since the last update where I get too much content flooding from my services (ie. I want control over what shows) I have disabled services. I would like to have them disabled for non-chi members but have contacts be able to see my Twitter feed, for example as that is perhaps too private for just anyone finding me on Google.

I don't see how to set granular privacy for the services, so am I just missing it or is this something that doesn't exist???