Hi Yahya,
Maybe: The filter will be added to the XPath constraint, executed as a query to your database. So, it depends on which attribute you linked the column with custom content to. If the CTRequestStatus can be retrieved via association as well, I don't understand why you would need a datasource microflow. Couldn't you just put the attribute there?
A possible alternative would be to store the current status persistently in the database and link the column to that attribute.
In general, I would not recommend doing any datasource microflow inside grids/lists/galleries for performance reasons. Instead, retrieve data over association or prepare the data upfront in additional attributes.
Sometimes, you need to revisit the grid and think: is the chosen entity the right one? In this example: not sure if it would make more sense to take the CTRequestStatus as main entity.
If this didn't help, please share parts of your domain model: how are IncidentReport and CTRequestStatus related?
Good luck!
Johan
Maybe a workaround with Enumeration to String through Decision activity will do the job if your ENUM has few outcomes