[syslog-ng] Parsing multifield lines

Hi, i'm writing a parser for lines having a repeated field on the same line eg(Recipient is repeated 3 times): ID: 123AABB456 Sender: user1@example.com Recipient: user2@example.com Recipient: user3@example.com Recipient: user3@example.com Status: Sent I would like to have a CUSTOM MACRO with all recipients. Is there a way to do this? Thanks --