I have used the following code to create cited/non-cited bibliographies.
\DeclareBibliographyCategory{cited}
\AtEveryCitekey{\addtocategory{cited}{\thefield{entrykey}}}
I want to further subdivide the 'Cited' bibliography called by
\printbibliography[category=cited, prenote={JoPE}]
into two sections. The first section is every cited reference except those for the journal named 'Foobar'. The next section is for cited references in the journal 'Foobar'. Both sections need to have prenotes.
biblatexmanual, section 4.6.2 'Stand-alone Tests'. The next section is also relevant, it's about complex tests. – Oleg Domanov Nov 18 '13 at 12:54