I've released a quick update that adds an author filter to the plugin. Just write your shortcode as
[wp-publication-archive author="billy" /] where "billy" in this case is the slug of the author.
It's a quick patch, so you can't use the author name ... just the slug.
I'll clean this up substantially in the future version for which this feature was planned ... but hopefully this will allow you to use the filter immediately.
I'm having issues with SVN at the moment, you this update isn't available from the WP.org repository yet, but will be as soon as I get a solid Internet connection. For now, you can download version 126.96.36.199 from GitHub and install it manually: