Remember that for traditional LC and PERM, experience with the same company in the same position cannot be used.
e.g. if in the LC/PERM ,company A states that 1 year's experience is required for software engineer job, you cannot use the experience you gained with that company A to apply for a software engineer LC.
However PERM allows experience with the same company if the PERM application is for a position that is substantially different i.e. has different job responsibilities.
Therefore, it's all in the wording of the LC.
Hope this helps.
P.S. I'm no lawyer!