Unless your guild has published "rules," I'd say it's up to you. From a personal viewpoint, though, I hesitate to show quilts I've quilted for someone else. I'll gladly share anything I've made myself, but not something made by another quilter. I'm not saying it shouldn't be done - it's just that I'm not comfortable doing so. I would suggest that if you do take quilts that you've quilted, you should get permission from the quilt maker to show it, particularly if they live in the area. They may not want the rest of the world to see their finished project before they do!