Same with 2K, despite the differences of application (i.e. Theocratic among the magisterial reformers, principled pluralism today).
The "differences in application" are directly contradictory theories of civil government. Simply because somebody uses the term "natural law" does not mean that they mean the same thing as the Reformers, or that they agree with them at all. There is a difference between mousish quitude regarding whether sodomites ought to be allowed to marry and a demand that sodomites should surely be put to death. The two theories of natural law have nothing in common, and are therefore not the same thing. This is even true if we examen Luther's theory of "natural law" as it was applied to the civil sphere. He called for the punishment of heretics and idolaters, as did Lutheran theologians for some time afterward. This has nothing to do with modern civil antinomianism, even if the same terms are used.