Hmmm. Not really.

Clip art is simply individual scenes/images that can be pasted together in a graphic program to make a picture.

In Poser you can render things like trees, furniture, people, buildings etc. Save each one individually as a .png file. That's a file without a background.  Then someone takes that image and pastes it to a background of their choosing and adds other 2D stuff to it too to make their own picture.  Some use the images to make websets.

And depending on the person's terms of use, some people may even use them in their commercial ventures.  

I didn't care what people did with the tubes that I offered so long as they weren't claiming them as their own and redistributing them.  Many used them for websets that they sold, to make greeting cards and a couple even wanted to use them in their business logo. I was fine with that.  It was just something fun for me to do and I wasn't interested in making money off of it.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi