This species has been described by the french botaniste Lecomte in 1909. It has been collected in Cambodia in the province of Kampot OR near the town of Kampot (located, of course, in the eponymous province). We have no further location details.
Jebb and Cheek has synonymised this taxon with N. anamensis Macfarl. in 1997 in their Skeletal revision of Nepenthes. They chose to not lectotypify this material at the time because the collections are fragmented and the inflorescence is not attached to either a leaf or a stem.
EDIT: Martin Cheek has spent times analysing again the Paris herbarium material and it seems he will reinstate N. kampotiana as a valid species. See Marcello Catalano's site for further details: www.nepenthesofthailand.com/
These are the syntypes of N. kampotiana dwelling in Paris herbarium:
The above specimens are deposited at
Paris Herbarium "Museum National d'Histoire Naturelle Departement de Systematique et Evolution - USM 602 Taxonomie et Collection Herbier (P) - Phanerogamie - CP 39 16, Rue Buffon - 75231 Paris Cedex 05 FRANCE"