Skip personal address book?

I have a names field that uses the type-ahead feature in a form in a general database (not mail - the form is not used for mail, either). I have seen similar questions to the one I ask below but have not been able to glean the solution I need.

Is it possible to skip/ignore the personal address book - and have a field only use the server/public address book when invoking the type-ahead feature?

Thanks for any help in advance,

Leonardo