Hi @Javi_Landa ,
Yes, you can use segment code. for that, create a new attribute 'segment code' in broadlog schema and do the following configurations as per this community post
Next, in your delivery of WKF1, provide unique delivery code in delivery property
eg, <campaign_name>_<workflowName>_<delivery1>
(OP234_WKF1234_DeliveryGold)
In WKF2, create a query as below, which will fetch all the recipients who got targeted in your 1st workflow for the segmentCode as Gold.
(incase if you have many deliveries in WKF1, you can modify the condition as
(delivery/@deliveryCode) is included in 'deliveryCode_of_delivery1','deliveryCode_of_delivery2','deliveryCode_of_delivery3' )
And use this query to exclude with WKF2 query