List of users against permissions

How do I have a list of users against permissions in AX 2012 R3? Please advise!! Thanks!!

Can you explain you requirement with more details, please?

I need a list of users with security roles they are assigned. Can this be extracted in standard AX? Please advise how best can I get this list.

There is no out of box report for that purpose. You may have to build a custom one.(either a report/inquiry (or) extending Data import export framework).