In order to restrict users from logging into their personal Google accounts, the policy should include a user constraint. This will ensure that only users with corporate accounts can access the corporate collaboration suite. The user constraint can be added by selecting the "User" option in the "Source" field and then choosing the appropriate user group or identity provider. The other options are not relevant for this scenario. References: [Creating a Policy to Block Personal Google Services], [Policy Creation], [User Constraint]

Explanation
In order to create a custom URL category to apply a secure Web gateway policy combining your own list of URLs and Netskope predefined categories, you must add the URL list to a Customcategory. This is because Netskope allows you to create custom categories that can be used in policies to block or allow access to specific URLs. You can also include or exclude predefined categories and other URL lists in your custom category. To create a custom category, you need to go to Policies > Web > Custom Categories and click New Custom Category. Then you can select the predefined categories and URL lists that you want to include or exclude in your custom category. You also need to give your custom category a name and save it. After creating a custom category, you can apply it to a Real-time Protection policy by selecting it from the Categories dropdown. The other options are not valid tasks for creating a custom URL category. You do not need to add the URL list to the Client configuration, as this is only required for client-side steering methods.
You do not need to add the URL list to a Steering configuration, as this is only required for network-side steering methods. You do not need to add the URL list to a Real-time Protection policy directly, as this will not allow you to combine it with predefined categories. References: Custom Category3, Create Custom Categories

To implement role-based access control when integrating Netskope tenant administration with an external identity provider (IdP), two statements that are true about this scenario are A. The roles you want to assign must be present in the Netskope tenant and C. You need to define the administrators locally in the Netskope tenant. Role-based access control (RBAC) is a feature that allows you to assign different levels of permissions and access to the Netskope tenant based on the user's role. You can use RBAC to integrate Netskope tenant administration with an external IdP such as Azure AD or Okta and delegate administrative tasks to different users or groups1. To do this, you need to ensure that the roles you want to assign are present in the Netskope tenant. You can use the predefined roles such as SYSADMIN, AUDITOR, or OPERATOR, or create custom roles with specific privileges2. You also need to define the administrators locally in the Netskope tenant by creating local user accounts and assigning them roles. You can use the same email address as the IdP user account for the local user account3. Therefore, options A and C are correct and the other options are incorrect. References: Role-Based Access Control - Netskope Knowledge Portal, Roles - Netskope Knowledge Portal, Integrate with Azure AD - Netskope Knowledge Portal