Artica v4.30 SP 421 allows you to define a personal category that acts as a white list.
This feature does not replace the global white lists but adds the two lists together.
The difference is in the use and maintenance of each list.
It all depends on your maintenance procedure.
Like the global whitelist section, assigning a personal category that acts as a whitelist allows all websites to pass through all access filters such as authentication, Internet filtering, ACLs and SSL decryption.