Hi Pooja Kulkarni ,
Welcome to Microsoft Q&A platform and thanks for posting your query here.
As per my understanding, you are looking for solution to filter out records out of SAP BW dataset using CDC in mapping dataflow. Please let me know if that is not the ask.
You can use 'filter transformation' for filtering out the records as per the desired condition, however , it seems you want to filter out as soon as data is getting read from the source so that only desired records show up which is not possible unfortunately , as pointing to the source using dataset would be the replica of data present in the source datastore.
Kindly consider using filter transformation after source transformation to filter out the records.
Hope it helps. Kindly let us know how it goes. Thanks.