It follows the same rules as the Script Console queries, or QueryService queries, or Rule Scoping queries, or Derived Metric scoping queries.

You can use practically anything in the topology model, except observations/metrics, in the queries.

for example:

with Hosts as your selection, you could write a rule such as:

lastUpdated > date(2013,6,1) and name matches '(?i)abcd.*'

Under Help, Administration and Configuration Guide > Customizing Your Environment with Tooling > Using the Query Language