As you have already created a smart list for converted leads. If I understood correctly, now you want to remove these leads from campaign. In this campaign you can check if leads are member of this smart list you remove step to delete.
Also if you can provide me some example, I can help you with some workaround.
Not quite correct. A single person can have multiple lead records in our instance. These different lead records can be populated with different values for different types of accounts and different lead statuses.
I need the ability check the email address in the smartlist that is used as the negative list. If a lead in a campaign has an email address that matches an email address in the smart list, then I want to remove them from the campaign.