[TYPO3-calendar] shared or attendee for different use

[Lars Möller]

hello list,

just another question.

i want to use a field called " target audience".  should be a field with 
the possibility to multi check it like the categories

maybe the fields attendee or shared could do the job and just a renaming 
of the label helps.

1. problem attendee isn't rendered out.
the marker is in the template, the field is defined for the group to 
create/select it.
some attendees are already created in the backend. nothing rendered out ...

2. shared field is in the create template shown but no content of this 
field is saved and in the confirm page nothing shows up (no hidden fields)
i also use this setting in the plugin.tx_cal_controller.rights.create.event
addFeGroupToShared=1
addFeGroupToShared.ignore =5
  fields.shared_user_allowed.group=1

this settings gets also lost after activating the fields.shared
if i remove fields.shared the group of the user is added correctly.

is there a possibility to use one of the fields in the way as target 
audience?
how could i achieve to render out the attendee field in the create template?

best
lars