Is it possible to create a custom task for Security Auditor that would allow a user to run the Segregation of Duty reports without giving them any rights to configure Security Auditor?
Yes. Make sure the particular User is not listed as a System Administrator on the Tools>Setup>Security Auditor>Security Auditor Setup>drop-down menu to System Settings window. Give the User security access to the Security Manager window. They can then look at Security, but they cannot change it.