Description:
Provide the ability to restrict a user from signing in to their corp account when signed into their personal profile

Use case:
Enterprises that have GSuite or Google identity still want to prevent IP or DLP from their users to their personal accounts. 
Some enterprises don't mind allowing their users into their personal accounts but want to keep these profiles completely separate including logging into their GSuite.  

Motivation:
Data loss and IP related concerns

Existing workarounds:
Limit access to gmail for personal accounts with existing policies to restrict this.  Goes against what the customer is trying to accomplish.