I wanted to add some hosts to specified hostgroup based on it's hostname when they are discovered by discovery rule with ICMP checks.
It would be nice to add this condition to whole discovery action like it is for autoregistration actions.

Unfortunatelly received value for checks like ICMP, FTP, TCP, etc. are not helpfull, and it's very difficult to assign hosts to specified host groups when SNMP (which can check hostname) is not available.