Set Sharepoint workflow task permissions

I have saw many posts about this problem, many questions but few answers.

 So, how do we set permissions to workflow tasks:

1. In workflow code behind create a HybridDictionary property something like this:

   

2. Go to the CreateTask action/shape properties

   

3. The hidden feature is in the SpecialPermissions property

   When you click the "…" button as usual this window appears

   

   The big secret is not to click the "…" button in the SpecialPermissions property, but in the round blue circle near SpecialPermissions, this window appears

   

4. Choose the right property and it's working

   

Simple and easy.