BWS Gallery

Hi,
as a rookie, I am trying to customize the BWS Gallery plugin for a multi-author blog so when click on Gallery on admin sidebar, each author see only his/her own posts(galleries) in the list table. not sure but I probably need to add a parameter identifying current user ID passed to edit.php. currently there is only one parameter passed like this:

http://myblog.com/wp-admin/edit.php?post_type=gallery

and it should be like this:

http://myblog.com/wp-admin/edit.php?post_type=gallery?current_user_id

but I don’t know how to add the second parameter. by editing function post_type_images() maybe.

any suggestion appreciated in advance.