Yes, there are Partial Poses available, and you can also make them yourself. Snow Sultan has some free ones (link above) and PoserStyle also has some in their membership items. I'm sure there are many others. To make your own, when you get your body part the way you want it, click the + signat the bottom of the pose directory menu to save it to your pose directory, but in the window that pops up, choose Select Subset. Uncheck Universe, then select each body part you want to save in the pose. Click OK and give it a name.