In a distributed setup you can use the contact groups from the slave, to see only certain things provided by this contact group on the master viewer site.
If you have a distributed setup, where you enable WATO and manage the contact groups central, you can ignore this how-to.
Step-by-step guide
Config on the slave
create a contact group on the slave
assign hosts and services to this contact group
assign the contact group to the user
Config on the master
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