On the German version of this page - see "Deutsch" in the right-hand column - you will find a list of the main teaching staff of the Institute. Under the header "Professoren" the full (scale W3/C4) as well as the associate (scale W2/C3) professors are presented.
The academic title "Außerplanmäßiger Professor" or "Außerplanmäßige Professorin" can be awarded by the University to a person who fulfills the requirements for appointment as a professor, and who has demonstrated outstanding achievements in research and teaching.
"Privatdozent" or "Privatdozentin" is an academic title conferred by the University to someone who holds certain formal qualifications that denote an ability to teach independently at university level (facultas docendi). In addition the holder has permission to teach and supervise PhD students independently (venia legendi).
"Lehrkräfte für besondere Aufgaben" is a definite legal term, which literally means "teaching staff with particular duties".
The precise defintions of "Außerplanmäßiger Professor", "Privatdozent", and "Lehrkraft für besondere Aufgaben" can be found in the Bayerisches Hochschulpersonalgesetz (BayHSchPG).
"Nachwuchsgruppenleiter" - Junior Group Leaders - are the heads of distinguished independent junior research groups, usually funded by third parties (for example, by the German Research Foundation, the Alexander von Humboldt Foundation, or the Federal Ministry of Education and Research).