Webform rules: compare a form field to a user field I am trying to create a rule that will update a user piece of info from a webform. 
The webform is a service request form and the field I want to update is a car license plate field, present both in user fields and webform fields. 
I installed the Webform rules module, which exposes the webform in the rules conditions but I cannot see anything changed. No webform or webform field appears in the conditions selections.
Does this module work? Am I missing something?
I guess that you can enable Rules Forms support Submodule of Rules. This submodule shows the correct name of your form (above each respective form) to be used with Rules.

Also, see this answer, is related with Rules Forms support submodule and other steps to make a comparision form fields with rules, I think that could be useful.

Update: This is the address to download the module Rules Forms support for Drupal 7 http://drupal.org/project/rules_forms

this is an screen shot in Drupal 7 about when is enabled rules for a specific webform: