When I set the document to my local langage, French, and with appropriate quote style in LyX, this preamble doesn't work (neither hang nor multiple, which other options do work),
I could visualize the 'hang' behaviour correctly when switching back to English. Same with 'multiple'. I am glad to see that hang can even be cumulated with para -- it actually fixes the para layout! Unfortunately none of them (and maybe other footmisc options aswell) do work in my configuration when setting up the language.
LyX 220.127.116.11 MiKTeX 2.9 up-to-date