# I'm in a subdomain pointed to a subdirectory called 'subdomain_folder'
# htaccess located in 'subdomain_folder'
# WP is in a subdirectory called 'WP' inside 'subdomain_folder'
# Complete Path: '/home/some-folder/public_html/subdomain_folder/WP

SetEnvIf Request_URI "^/WP/wp-content/plugins/plugin-dir/timthumb\.php$" allow

AuthType Basic
AuthName "Reserverd Area"
AuthUserFile "/home/some-folder/.htpasswds/public_html/subdomain_folder/passwd"
Require valid-user
Order allow,deny
Allow from env=allow
Satisfy any