There are essentially two methods you can choose from to hide your IP address. One is using a proxy server, and the other is using a virtual private network (VPN). Either one will be sufficient, but there are a few cons associated with proxy servers that make VPNs a more optimal choice for many.
Can you lock an IP address?
To lockdown the IP address that a user can access their account from, the tick-box against the user to be IP locked must be checked, AND the allowed IP address of the user must be in the table of IP ADDRESSES that the system will accept access from.