[Tracker] How can tracker databases be used by multiple users?

["Stefan v. Wachter" <svwa-dev mnet-online de>]

Hi Tracker folks,

I would like to deploy tracker on a fileserver. There exist multiple  
user groups with various access rights to different folders and files.  
I would like to create one user "tracker_index", who has access to all  
files. Under this user the tracker-miner processes should run and do  
all the indexing work.
Then I would like to create another user "tracker_query". Under this  
user, which has a password publicly available for all people using the  
fileserver, it should be possible to run a tracker-search query.
I tried to replace /home/tracker_query/.cache/tracker by a softlink created by
 ln -s /home/tracker_index/.cache/tracker/ ./tracker
and disabling indexing under /home/tracker_query/.config/tracker .
Unfortunately it does not work so easily.

Is there a recommended way to deploy tracker on a multi user fileserver?

Thanks for advice!
Stefan