I run like a girl

So suppose you have a corporate gig and have a few successful designs under your belt and you plan to keep working for this company for a long time because you like the job and feel a lot of respect and loyalty towards them.

Now also suppose that you are working with a few other designers kicking around the idea of starting up some kind of firm that would in no way compete with your current employer.

Is there some protocol for putting work done under the corporate gig in the portfolio for the collective?