In pAdmin you can determine which groups can have access to the list of logged in users (Users online ("ping")). In addition you can decide which groups can send direct ping messages.
|1| Click in the main menu on Services
|2| Click on the perm button in the row Users online & Sending ping messages.
|3| Now you see a list of the existing groups.
|4| Click the checkboxes next to the desired groups.
access
read
write
Access to the list of logged in users
Can send ping messages to logged in users
|5| Save your selection with the button set permissions