Daily quota for post submissions
You would have to hide the button or page where users could upload a photo.

To do this you could query for all that users entries with today's postDate. If the total is equal to or more than 10 then you'd redirect them to a different page or hide/disable the button that submits an entry.

Something along the lines of the following

add-image.twig

{% set todaysEntryCount = craft.entries.section( 'images' ) authorId( currentUser.id ).postDate( '&gt; ' ~ now|date_modify('-1 day') ).total() %}
{% if daysEntryCount &gt;= 10 %}
  {% redirect /your-images?message=dailylimit %}
{% endif %}


or

{% if daysEntryCount &lt; 10 %}
   &lt;button type="submit"&gt;Add your image&lt;/button&gt;
{% endif %}