Time Limit Question

In the Time Settings, it looks like one can set 'What to do when computer's time limit has been reached.'

 

One option is, "Automatically lock Bill's computer".

 

Question:  I have 3 users for this particular computer.  Will this feature 'lock' just Bill's user account?  ...or will it 'lock' Bill's and all other users from using this computer on the internet?