We already have few custom forms handling the code below https://github.com/openmicroscopy/openmicroscopy/blob/develop/components/tools/OmeroWeb/omeroweb/webadmin/custom_forms.py#L345 that we use cross application. Please look at GroupForm how list is defined https://github.com/openmicroscopy/openmicroscopy/blob/develop/components/tools/OmeroWeb/omeroweb/webadmin/forms.py#L137 We cannot have that hardcoded as maintaining name it will be very difficult