Due to the way clothing/the clothing importer works, it is not possible to simple switch clothing between M/F.
Those clothes are wrapped around and imported for a certain figure.The meshes for Female and Male figures are too much different.
The official way would be to ask the creator to import a male version, too.
The creator has to use the tool "DAZ3d", fit the clothing meshes he had created to a male figure, and re-import it into VaM with all settings and stuff. It is somewhat time consumpting, so he might not want to do that.
Though, maybe there might be a fancy secret trick to do this I don't know... but if there would be one, it isn't well know.