@V, Gukan Thank you for reaching out to us, As I understand you are looking to create a role assignment or custom rbac role so that the user can only query a particular custom tables.
As per this article we cant grant access to individual custom log tables, but you can grant access to all custom logs.
Let me know if you have any further questions, feel free to post back.
Please remember to "Accept Answer" if answer helped, so that others in the community facing similar issues can easily find the solution.
@V, Gukan Unfortunately it's not possible to give permission to custom table. Also, there is a feedback request for the product - https://feedback.azure.com/d365community/idea/49573ce4-ae3d-ec11-a819-000d3ae2b306 you can upvote the same and add the business justification for this feature to be added, as this is closely monitored by our product group team.
Will also check with them if we have this feature request in pipeline or not.