Dear @Bhuwan_B ,
When you say 'users', what does it mean?
If you are capturing customer ID in Target for personalization, then you can use Customer Attributes.
You can add an attribute, let's say, 'Target Users' with values 'Yes' or 'No' to add them to your audience bucketing that the users only with values 'Yes' should be targeted.
For anonymous visitors, we already have plenty of audience attributes in Target and the same can be configured based on audiences.
@PratheepArunRaj Thank you for your quick response, I appreciate it! I wanted to understand that, I want to Enable only the A/B Test option for a few user groups who will get onboarded to use Adobe Target. Is there any permission I need to apply to have that restriction (at the Workspace or Properties level)?