Multiline field extractions

I have an event which looks like this"

USERNAME            HOME_DIR           USER_INFO
root                /root              root
ec2-user            /home/ec2-user     EC2 Default User
test_user1          /home/test_user1   Testing User
test.user2          /home/test.user2   Test User 2
realuser            /home/realuser     A Real Person

I want to build a field extraction to capture each value from the 3 columns, but i cant get the extraction tool to find any more than one occurrence in any event. I presume this is because it is not attempting multiline extractions, but fiddle and try as I might, i cant get multiline (?m) extractions to work.

Can anyone point me in the correct direction?