You can block the user for who you do not want to display the chat.
(1) After logging in to the ChatPlus management screen, click [Visitor] at the top of the screen.
(2) The list of visitor will appear. Click the user for who you do not want to show the chat.
(3) Click [Edit] at the upper right of the screen.
(4) Check the box [Hide the chat] and click [Update].
(5) Check if the block mark is displayed.