Graphically, this could be achieved by adding a checkbox with the label "enabled" in front of the text input field of the filter.
A help text below the filter fields should explain that this behaves like an AND (not OR) selection criteria.

Comments

not_Dries_Buytaert’s picture

Though I am not sure, this request might (!) already be submitted here: http://drupal.org/node/535736

timb’s picture

This is a great suggestion. Bump

greenskin’s picture