We looked into this a few months ago, but discovered that the latest version of Daylite lacks this ability that was at least possible with the previous version.
I did look on their website and went back to some discussions regarding the release of v4 where I learned the previous Filemaker connector would not work in v4 of Daylite which was rewritten.
But their Daylite API page lists AppleScript and Plugins as two ways to integrate with the client version and CalDA and CardDav for the Daylite server. So I though perhaps someone had created a plugin for this version 4 product for Filemaker. Perhaps it's not possible with their new API and their page has not been updated.
Thanks for your input.
Richard, did you find any solution ?
My client is also needed in Daylite 4 and Filemaker integration.
Looks like Daylite is based on PostgreSQL engine, may be we could use ODBC connection to the database of Daylite ?
Just try our new Filemaker Plugin: fm4CardDAV on our website : http://fm4all.net . FM4CardDAV is a Filemaker Plug-In to manage your Contacts in Filemaker and synchronize this with your CardDAV Server like Daylite, Kerio, OwnCloud, iCloud, Google Plus ....