This is even stated in the file.
export/doc/he/(Intro|Tutorial)_pdf4_texF
export/examples/he/(example_lyxified|example_raw|splash)_pdf4_texF
#
-# Inside the file we state
-# "Due to technical reasons PDF-Reply works only when using pdflatex."
-# The file also seems to compile with lualatex as well.
-export/examples/PDF-comment_(dvi.*|pdf[^25]*)
+# Inside these two files, we state that they should only be expected
+# to work with pdflatex and possibly lualatex.
+export/examples/PDF-(comment|form)_(dvi.*|pdf[^25]*)