You can (and should, and probably are required to, to get anything done in Scribus) use Paragraph Styles. I don't know, though, if you can independently style the borders for a single paragraph.
Lesseee here.... Nope, I can't find it. At least not quickly. You can create an indented paragraph style, but not style borders around the paragraph. I'll bet Scribus 1.3.5svn lets you do it, though... -- JDS
