DFFs to be read only by users who only have employee role.

Summary: We have some DFFs housed inside the Biographical Info section inside Personal details Quick Action.

We want these DFFs to be read only for users who only have employee role but the HR Specialists /Managers should be able to edit . I saw some document in support, "Syntax for Referencing User Role in an EL Expression ( Doc ID 2695521.1 )". But that didnt help me out. Currently I am using the EL Expression, "#{(pageFlowScope.SameUserLoggedInFlag eq 'Y')}" but this isn't working.

Current Result: Its getting read only for users who have HR Managers/HR Specialists role also. We want users who only have employee role, shouldn't be able to edit these DFFs.