The authors widget is a good way to list the authors of your blog with a link to a page listing all of the their posts.
It appears you want something different from the authors' widget. If I understand, you want widgets for each author to display a set of pictures of their choice.
If so, then you (or each author) will have to handcraft one using table coding.
Sidebar for Dusk theme = 170 Use photos 80px wide, aligncenter
table with 2 rows, 2 pictures per row:
</table><table style="background-color:#000000;" border="0" cellspacing="0" cellpadding="2" width="170" align="center">
Or you could use a Flikr widget for each author (of course each author would need a Flikr account)