No, Landrace means it's been grown and propagated by humans via open pollination in one place for many years, they are not the same as wild cultivars. Yes, once you grow them elsewhere, they then become heirloom if preserved without cross breeding.
Here's the best online definition:
What Is Landrace Cannabis?
Landrace cannabis is a strain that has never been altered or crossed by growers, resulting in the evolution of stable genetics thanks to natural selection and long-term exposure to facets of the strain’s natural environment.