In Germany there exists the title Priv-Doz before the name of some professors. What does it mean? Do these professors allow to hire postdoctoral applicants?
Formally it is a title given to a university teacher, translation: private lecturer. It means you are able to teach, but not yet a professor.
In practice it is the required step-up from the PhD degree, to get a permanent position.
A Privatdozent (PD) is a university scholar who has a Habilitation and is thefore allowed to supervise PhD students, but is not (yet) a professor. They may hire postdocs if they can obtain funding. Unlike professors, their position usually doesn't come with funding for PhD students or postdocs. In fact, the title PD ist just that - a title. It doesn't indicate anything about the position that the PD may or may not have, except that they don't have the position of a professor.
In other words, in Germany and Austria a PhD thesis makes you a doctor, and a subsequent Habilitation makes you a PD. Traditionally, you need a Habilitation to be hired as professor.