In the BW Modeling tools, when you create a DTP, you can re-use the filter definition of an existing DTP. The target can be a different one, or even the project can be a different one.
![You can copy filter restrictions from one DTP to another. The first step is to create a DTP with a filter and choose Copy Filter. For the second step, create another DTP with a target with the same InfoObject, and choose Paste Filter. The restriction is applied to this InfoObject. As a last step, activate the DTP.](/service/media/topic/c8dd7729-72af-4185-9f58-23ecda645cc3/BW4HED_2404_en-US_media/BW4HED_2404_en-US_images/BW4_Copy_DTP_Filter_Scr.png)
For more details refer to following source:
Copying the Filter Definition for Extraction (New) | SAP Help Portal