It means the lobsters were processed in Maine. Unless contracts have changed since I changed from working for a lobster processor to a fish place (very possible) they were likely processed in Prospect Harbor, ME but the lobster itself would be either caught by Maine or Canadian (NB) boats.

It's likely that you'll have frozen lobster for a bit. MSC is allowing people to pack under certification until Dec 15th, buy then the processor will have enough in the freezer to fulfill WFM orders probably until summer rolls around again. WFM lobster is treated differently than non-WFM designated and packed lobster in that it was electrocuted prior to slaughter while its not standard to do that for any other customer.