Is it possible to enable an option where you can view which user uploaded an image to an album? Maybe something under the image saying "uploaded by ..."

Sort of. Check out the example plugin filter-new_objects. It will add the name of the user who uploaded the image to the description. There are some restrictions, specially with regard to ZIP files. If you want something more sophisticated, you could change the plugin to put the uploader's name in the custom data field.

This plugin was not really intended to be very useful, just an example of what one might do.