Well for Dynamic clothing it should be not to difficult for LaFemme2 to LaFemme. Simply load LaFemme2 and the clothing you want to port over to LaFemme. In frame 30 set the Morph Tool_LaFemmeShape at 1 that you can find in the Tools. I do not remember if this tool is available only for LaFemme2 Pro or if they are already in the base LaFemme2.

Set up a simulation and simulate. Go to frame 30 and export the clothing to a new obj file. Make sure to select only the clothing and not LaFemme2.

Delete the figure and clothing in the scene and now load LaFemme. Import your saved obj that should match now LaFemme. Note that like normal clothing if you want to wear a cloth that is fitting a child and you are an adult it will be to small for you and it will be exactly the same for your 3D figures.