Under the Grand Lodge of Ireland:
(Law) 134. No Military Lodge, under the Constitution of the Grand Lodge of Ireland, shall initiate any civilian anywhere if a lawfully constituted Lodge exists within ten miles of the place where such civilian resides, or where such Military Lodge then meets. A Lodge of civilians shall not initiate any military man below the rank of a commissioned officer, where there is a Warranted Lodge in the Regiment or Garrison to which such military man belongs; nor shall a Regimental Lodge initiate any military man not belonging to the Regiment if there is a Garrison Lodge in the locality where the Candidate is stationed, or where such Regimental Lodge then meets. Any Lodge violating this Law shall have its Warrant cancelled or suspended, or shall be fined one hundred euro, as the Grand Lodge may see fit.
TLDR: Civilians cannot be initiated in a Military Lodge. There's even a fine and penalty if a Lodge initiates so.