I had similar problem, what I did was creating many groups and giving privilages for groups, in your case it can be even one group per one person, but it can works :)
e.g.:
Gr_for_Renee - priv. for dpt: Front desk, Reservation, Billing, General
Gr_for_Raul - priv. for dpt: Front desk, Billing, General
Gr_for_Jessica_Jacob - priv. for dpt: Housekeeping , Lost & Found
Gr_for_Angel - priv. for dpt: Reservation, General