Custom owners can be created using computer names, IP addresses, and IP address ranges.  Custom owners may also be organized using groups. These features can be accessed by right-clicking on the Computers container in the Owners pane.

To add a computer by name, right-click on Computers and select 'Add | Computer'. Then type the name of the computer that you would like to add. Assignments can now be made to that computer in the same manner that they would normally be assigned to a Group, User, OU, etc..  Wildcards are supported with named computer owners. These wildcards include ‘?’ and ‘*’. A ‘?’ is used to specify one character, and a ‘*’ can be used to specify multiple characters.

To add a computer by IP Address, right-click on Computers and select 'Add | IP Address'. Then type the IP address of the computer that you would like to add.

To add computers by IP Address Range, right-click on Computers and select 'Add | IP Address Range'. Then type the low and high IP address of the desired range.

Groups can be added by right-clicking on Computers and selecting 'Add | Group'. Once the group is created, owners can be added to the group by right-clicking on the group and selecting either 'Add | Computer', 'Add | IP Address' or 'Add | IP Address Range'.  Groups may also be nested within other groups.

To delete an owner that has been added to the Computers container, right-click and select delete.  Deleting a group will delete all nested groups and owners.