If you select 'File | Log In' of LocalMain ( Ctrl + O key ), dialogue box is shown such as <Figure 1>.
<Figure 1> Log In dialogue box
Input the user name and password which are set at 'Config | Users' and press the 'OK' button at <Figure 1>, then you can log in as entered user.
If you log in as specific user, permission and used color etc are changed according to setting for user.
Also, log in can be done by script as follows.
Reference) Default configured administrator name and password are 'ADMIN'(password is same with user name). You can modify this contents at 'Config | Users' menu.
Relate items)