Survey permissions
From LimeSurvey Manual
The survey permissions apply only to a single survey. If you want to set permissions for the whole system, you can use the global permissions system.
If you want to use the survey-restricted permissions system, click on the Survey permissions button located on the Settings menu.
To find out more about the survey permissions functionality, continue reading the following wiki section. We recommend everyone to read the whole wiki page to better grasp the LimeSurvey permissions system.