The Vulcanis Lunar Colony was a Vulcan settlement.
Tuvok was born in the Vulcanis Lunar Colony on stardate 38774 (2264). (VOY: "Unimatrix Zero, Part II", "Flashback")
This colony was only mentioned in dialogue.
It is not clear where this colony is, since Vulcan
has no moon
. The adjective "lunar" is usually associated with Luna
, Earth's moon.