Writer's stylist window contains combo box with some predefined style filters
like All Styles, Custom Styles, Applied Styles, Text Styles, etc. It would be
nice to have a possibility to provide my own styles filter in extension (or in
any other form). So, I can hide styles that I'm not going to use (like
predefined styles, ...).

The idea is from this thread (example included):

  http://sw.openoffice.org/servlets/ReadMsg?list=dev&msgNo=2056

Also it would be nice if I can hide some of predefined style filters, so, the
user can access styles, which are listed only by my filter.

We are using OO.o for some typesetting work and our goal is to hide some
predefined styles, predefined styles filters and provide our own styles filter.