Users And Permissions

Users And Permissions

Dear Sir

I would like to set permissions for some fields

But i can not do that

In the notes it says some old accounts can not do this

I have to solve this please help

What i want is easy

I want to create roles and i want to set some fields to be shown some groups and some other other fields

What i see now
Show field to Admin or Everyone.I need to create some Other goups such as Account Department or Exporting etc

Thanks