What you can do is to create an automatic computer group and assign the user to this group. Just follow the steps:
Click on Tools, Create New Automatic Group.
Below “Include computers with the following proterty”, select “Relevance Expression” (first option)
Select “is true” option
Click on “Edit Relevance” button and paste the following relevance:
exists addresses whose (it as string starts with
"10.168") of ip interfaces of network
Click “Ok” twice and type your password.
Then you can go to the “Console Operator” tab, right-click the user, “Assign User Management Rights”. Click “Add”. In the tree, go to “By Group” and select the group you previously created.