Does dbFront support multiselect lookups, where one of the relationships consists of a composite primary key? I tried setting it up but it's only showing as One to Many. Not sure if it's unsupported or I'm doing something wrong.
As of version 1.4.0.0186, dbFront now automatically handles composite keys in Multiselect fields.
If you encounter any issues then please let me know.
For more details on creating a Multi-Select see. Multiselect Lookups/Dropdowns