Our current implementation has most of our users as Technicians (e.g. HR, IT, misc business departments).

I would like to be able to limit who can see tickets.  For example, when HR submits tickets for termination, only HR and IT should be able to see it.

I know we can limit by site and group.  However:

1) This would be cross group (both HR and IT would need to see the request)

2) This would be cross site (HR from another locations need to see it, and IT may be in a separate site). 

Any other options?

Thanks.

Kevin