Your question is posted to the wrong place.
Lourmarin is a beautiful town in the far south of France, in the département of Vaucluse in the region of Provence-Alpes-Côte d'Azur.
All of the historical parish registers and état civil are digitized and online with free access directly from the archive's website here:
http://e-archives.vaucluse.fr/pages/enligne.htmlYou can find your connection there.
Note : When you post messages, it is always helpful to include dates, even if they are approximate.
Bonne quête !