Finding specific contributors images possible?

Hello there,

I was wondering, if there is a way to find a specific contributors images by name?
As I find a photo by search and click the contributor's name, then I can get his/her
portfolio, but in case I have the name of a contributor, how can I find all of the
portfolio's images? I tried with several names, but it doesn't seem to work via
the image-search-field.

Thank you for your help,

Greetings René