You can look at sharing the PDF with your colleagues, if you do not have a Tableau server. But if you do have a Tableau server, you can restrict your workbook to only those users. But of course, Tableau Administrators can always view them.
I think that my company don´t have the Tableau Server license.
Actualy I use to share the Tableau Public, and there I don´t have how restrict the view in my workbook.
I will checking with the license administrator about Tableau Server licenses.
Please, Can you said where in Tableua Server I can make this restriction?