LaFemme also comes with inj morphs for the Pauline conforming hair that comes with Poser 11, so you can use these 4 with LaFemme. Additionally there is a morph for LaFemme that chahges her head shape to accept Victoria 4 hair here.

https://www.renderosity.com/mod/freestuff/la-femme-v4-hair-fit/81132

To clarify, only clothing that is specically made for LaFemme will conform to her properly. Other conforming clothing from any figure can theoretically be converted in the fitting room, while this is relatively easy for close fitting clothing I personally find it difficult for anything like flowing skirts, and these are best used as dynamic clothing in the cloth room.