How can I limit page parent dropdown to show only author’s own pages?

From the source code the function wp_dropdown_pages uses get_pages() and this function uses different attributes than WP_Query or get_posts(). It uses authors instead of author.

Note from the codex:

authors
(string) Only include the Pages written by the given author(s)
Note: get_posts() uses the parameter ‘author’ instead of ‘authors’.