In the webform content type create a field "webform_results_access" of type "User Reference" (multiple values).

On "Manage Display" hide the field (unless you want everybody to know who may access the results).

depends on References module : "https://www.drupal.org/project/references" (for user reference field)

Instructions:

NOTE: Since v20180319a STEP 1 is NOT required

0. Preparation:

• Clear Drupal cache (just to be on the safe side)
• Download install and activate this module : https://www.drupal.org/project/references
• Download install this module from github (don't activate it yet): https://github.com/plirof2/d7_webform_results_access

1. Add a new field to the webform:

Go to webform manage fields (eg http://mydrupalsite/subpath/admin/structure/types/manage/webform/fields ) and

• add a new field to the webform named : "webform_results_access" .
• the field type should be "User reference" (you need the References module activated (https://www.drupal.org/project/references) )
• The graphic component should be "Autocomplete text field"
• The machine name should be "field_webform_results_access" (this is the default value so no need to change it)

2. Set some settings for this field:

• Go to http://mydrupalsite/subpath/admin/structure/types/manage/webform/fields/field_webform_results_access
• select "number of values"/"Αριθμός τιμών" to "Unlimited" (we want to be able to add unlimited users to view results)
• from the option "User roles that can be referenced" select a user group - usually "registered-authenticated users"/"πιστοποιημένος χρήστης"
• Maybe you want to restrict visibility and permission from the option "Field visibility and permissions".

3. Activate module

• Clear Drupal cache (just to be on the safe side)
• Activate module d7_webform_results_access

Changes:

20180319a

• Auto create FORM FIELD (now)
• used https://www.drupal.org/project/references/issues/1345380