Yes, it is not very convenient but you can achieve that.
Step 1: Select the gallery in the Organizer, and uncheck the option to allow Dates and Metadata under Access Control.
Step 2: Select all the photos in this gallery, click Edit in the Access Control section again, unselect "Same as..." at the top and explicitly check the option to allow Dates and Metadata.
Save, and the result will be what you are looking for.