This will now work as of [Sprout Forms v2.2.0](http://sprout.barrelstrengthdesign.com/craft-plugins/forms/updates#release-v2.2.0):

    {# Ordering #}
    {% for formEntry in craft.sproutForms.entries.formHandle('contact').order('address desc') %}
      ...
    {% endfor %}
    
    {# Filtering #}
    {% for formEntry in craft.sproutForms.entries.formHandle('contact').firstName('Zoe') %}
      ...
    {% endfor %#}