Hi @becker77
your question in not clear enough therefore check the answer based on my understanding of the question.
If you are using several AAM lists in a workflow and combine them in one incoming transition, you can define a new column in Read list or Enrichment node (ex. segmentName) and hard code some identifier value (to know from which list customer is coming) before combine them in one incoming transition. Finally, in delivery you may use if condition to show specific content per segment (if targetData.segmentName == "some_segment").
If you have alreadysegments in the specific column in each list, then you can use that column directly in delivery to send specific content per segment as stated above.
Regards,
Milan