Yes, it can.

I don't have sample data at hand right now, so I can't give you the exact example, but if you inserted the footnote (or endnote) with the standard Insert Footnote menu item, the integer is well tagged with something like "<span class="footnoteReference">....</span>" tags. If you're on a Windows machine, just save a demo document as HTML and look at the result with a text editor, it should be clear enough. Don't be intimidated by the several KBs of CSS in the beginning :)