It's not entirely clear what kind of customisation you're looking for, so we would need more details. To which specific report are you referring? What specific 'customer policy labels' are you talking about?
The ISE reports allow limited customisation. If custom attributes have been configured, there is no way to add them as fields in the reports. Depending on what information you are looking for, it may require manually correlating information from various reports.
For more flexibility in reporting data, we typically recommend sending all relevant logging information to an external syslog server (like Splunk) and creating the required reports and/or dashboards there.
