Android :: Caller ID Settings Based On Whitelist/blacklist

I wonder if there is any application which allows me to define a list of contacts that should not receive my phone number when they are called.
Or otherwise: a list of friends that may see my caller ID, everone else not.

The reason for this is easy: I use my android phone on work but I don't want all customers have my private number just because they receive a call from my mobile phone.

I tried adding *31# before a contacts phone number which actually works, it disables the caller ID for the next call, but incoming numbers don't match the deposited phone number in the phonebook so I can't see who's calling I just see a number.

Is there a solution to my problem? If there isn't an automatic way to do this, maybe there is a quick-switch application I can place on my phone: hit once to toggle caller ID on/off...