View All Worklogs Permissions for a Project
A user with this permission can view the worklogs made by other users on issues within a project he is allowed to view (has the Browse Project permission). To grant View All Worklogs permissions for a project, you need Jira Administrator permissions:
Select a Project > Project Settings > Permissions to view the permission scheme associated with the project.
To modify the permission scheme, click on Actions > Edit Permissions in the top-right corner.
Under Time Tracking Permissions, select View All Worklogs.
Modify the permissions as needed.