The best example is probably when people leave their positions as public office holders to become consultant lobbyists or to take a job with an organization.
When they leave their positions, they're prohibited from lobbying for five years. However, if they take a job with a company, they may engage in lobbying as a significant part of their duties.
In the past, anyone could leave their position, take a job with a company and engage in lobbying activities. The limit used to be 32 hours. Nowadays, it's eight hours. The reason lies in the fact that an exception is made for companies when a person leaves their position. This is tied to the post‑employment restriction on lobbying.
It's quite blatant. Moreover, no reasonable justification explains how an exception would apply to working for a company and engaging in lobbying, but not to a not‑for‑profit organization.