For Portal Only

Edit knowledge Properties:

1) Make list of Roles Field Empty

2) Clone the widget KB Article Comments

Server Script:  

data.role=gs.getSession().getRoles();

HTML:

replace 

  <div ng-if="data.response" class="alert alert-success">{{::data.response}}</div>

with 

  <div ng-if="data.response && data.role" class="alert alert-success">{{::data.response}}</div>