Can you password protect certain columns in an excel spreadsheet while leaving others open to editing?

I'm trying to have a shared spreadsheet with 4 columns protected with a password, but leave other columns open for editing by as many as 40 users. I can do what I need by locking the columns without using a password, but then any user can just un-protect the sheet which defeats the purpose.

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia��).