Hi @Dom
I did a simple test and here is my source data.
Then I used this expression in Tablix filter:
=IIF(Fields!MedCampaign.Value like "AffCPD_1224*" OR Fields!MedCampaign.Value like "AffCPD_1225*",1,0)
Result:
Hope this helps you.
If the answer is useful, please click Accept Answer
to let others with similar questions quickly find answers. If you have any questions, please feel free to let me know.
Best regards
Aniya