How to exclude a specified login user from Linux

Recently, there is a business scenario needs, you have to put some of the user on the server to kick off, oh, nonsense not to say, methods have two

1. First Use W(or who) to see who landed on the server:

2. Below, we need to kick off the Caesar user who landed on the 192.168.56.2 machine

(1). Kick off by pkill-kill-t PTS/6

(2). Find the corresponding process number by Ps-ef | grep pts/6 Command First

Then kill the process 4266:kill-9 4266

At this point, under W view, found that the Caesar user logged on from the 192.168.56.2 machine has been kicked off

How to exclude a specified login user from Linux