This article tells how to limit the IP Address User login system. But you can only use this feature on the Google Chrome
I. Setup IP Address Restrictions
Step 1. Go to the 'Users' menu then go to the 'Group' sub menu

Step 2. Select the group that you want to give restriction then mark checklist on the 'UserIPRestriction' role, click Save

II. Setup IP that Only Allow to Login
Step 1. Go to Setup then More Menu section Login Restriction

Step 2. fill the IP in the 'Login IP Address' section at the bottom of this session according to your computer IP address
