Similar requests come up quite frequently, but such feature will not be implemented in Jazz I believe. This is due to the fact that Jazz itself does not do authentication - it's done by the application server, Tomcat or WAS. That's why you see that the instructions are for the application servers specifically. For WAS, the below post may help.
https://jazz.net/forum/questions/202123/how-to-track-user-login-attempts
http://www.ibm.com/support/knowledgecenter/SSAW57_8.0.0/com.ibm.websphere.nd.doc/info/ae/ae/tsec_sa_secauditing.html?cp=SSAW57_8.0.0%2F1-11-9

Note that if you track the license usage, you may miss user sessions that do not require a license - viewing work items only is such a case.

If you put Jazz Authorization Server into the mix (6.0 or newer), then it will be quite different and you can request this feature in it.