At first, the Werewolf application should be added to your Jira. Read how to find, add and manage the Server apps (Atlassian documentation).
The app doesn't work out of the box – it must be configured before. After installation click the Configure button (or find the app in the list of Teamlead apps in Jira Administration → Manage Apps → Teamlead → Werewolf) and specify a groups of users that will be able to work by other user's profile. All users of the selected groups will be able to use the application – check the User's Guide to learn about Werwolf's functionality.
The Audit Log tab contains the information of Werewolf functionality using by Jira users.