NetApp
Configuration : Local Users and Groups > Groups : Configuring local groups : Assigning local users to a user group
Assigning local users to a user group
You can assign one or more users to a group, giving those users the roles and capabilities associated with the group.
Steps 
1.
From the Home tab, double-click the appropriate storage system.
2.
In the navigation pane, click Configuration > Local Users and Groups > Groups.
3.
Select the group to which you want to add one or more users.
4.
Click Edit.
5.
In the General tab, click Add.
6.
In the Local/Domain Users dialog box, select the user that you want to add to the group and click Add.
If you have configured CIFS with Active Directory domain authentication, you can add a domain user using the following format:
<domain>\<user>
7.
Repeat Step 5 through Step 6 to add multiple users to the group.
8.
Click Save and Close to save your changes and close the dialog box.
Related reference 
Groups window