Looking at Fe_4N from the ppt and we only look at 1 primitive cell, you find for the Fe-I site a 4-fold rotational axis (through N and Fe-I) and then 2 1-fold rotational axis’ (on the plane with the 4 Fe-II). Then for the Fe-II site you find a 3-fold rotational axis (through N and Fe-II) and then 2 1-fold rotational axis’ (in the plane perpendicular to the first rotational axis).