I am trying to customize a biblatex citation style (adapted from biblatex-juradiss). I have the problem that in my text I use many \cite commands which have two or more authors given in the prenote, and I want them formatted similarly to the editors of the publication that is referenced. So if I write
\cite[Smith, John and Johnson, Henry][23]{biblabel}
I would like the output to look like:
Smith / Johnson in: Editora / Editorb, other bibliographical data, p. 23.
where Editora and Editorb are the editor's surnames from the entry in my .bib file, and "other bibliographical data" stands for whatever biblatex would normally output after the editors. Biblatex does the editor list nicely, and I'd like the authors to look the same.
Please note that the slashes are not in italics, so I can't just give the additional author names inline with the slash in the prenote. Also, biblatex uses whitespace in the editor list which is somewhat narrower than usual.

prenoteargument would have to be passed to Biber from within the document, as Biber has to parse name list like these forbiblatexto make sense of them - and I'm not sure how that would work. You could create a dummy entry for "Smith, John and Johnson, Henry" though like@misc{smithjohnson, author{Smith, John and Johnson, Henry}}in the.bibfile and then do\cite[\citeauthor{smithjohnson}][23]{biblabel}. (If you go for this option, biblatex. comfortable author citing might be of interest to you.) – moewe May 23 '14 at 05:10@miscfor the dummy entrysmithjohnson, it might be better to create a new entry type@person/@authorthat does not appear in the bibliography even if cited and just holds the names. See also Create a register of persons with biblatex. – moewe May 23 '14 at 05:14postnoteandprenoteare treated differently from the other fields bybiblatex. While the standard fields are consumed (and digested) by Biber, Biber does not get to see eitherpostnoteorprenote, neither are the two fields mentioned in any of the data model files (so one would not be able to change the type fromfieldtoname; and it would be necessary for Biber to be able to see thepost/prenotefields). – moewe Aug 10 '14 at 08:49