No, this program does not include a membership to the Critical Bench Vault. You may become a member through purchasing a program that does include the membership. The membership is not available for enrollment any other way.
You can review the list of program that include the membership to Critical Bench Vault here.
Please note that all enrollment through these program initiate with a free 14-day trial period which offers a limited version of the membership. After the 14-day period, your membership is unlocked and you will have access to all the features of the site and you will be automatically be invoiced for 47$ per month.
For more support for the Forward Head Posture Fix program, please submit a ticket here