Can I import log data from one logFaces server into another?

Yes.

You can completely back everything on one server and then restore it on another. Backup can be either from client or using our standalone Backup utility. Restoring data can be done only with client.

You can also save queries into binary format and then import them on another system using the client.

If you using external database, you might as well use any third party tool to take data from one database and bring it to the other. Just make sure that logFaces servers on both ends are down when you access the databases.