'trusted_domains' =>
  array (
    0 => 'localhost',
    1 => '10.0.0.0/16',
    2 => 'aa.bb.cc.dd',
  ),

<Directory /var/www/http/owncloud/>
    Options Indexes FollowSymLinks MultiViews
    AllowOverride none
     Order Allow, Deny
     Deny from all
     Allow from 10.0.0.0/16
     Allow from aa.bb.cc.dd
</Directory>