I'm not aware of any case where it was made public, but it certainly has been disclosed to investigating agencies for prosecuting an individual who's subject to an offence that required that information. So yes, it has happened under the circumstances. Further disclosure of that is prohibited by the persons who would receive it. It's not necessarily been done in public, but the information has been disclosed to investigating agencies who have required it.
On June 7th, 2007. See this statement in context.