Policy agent treats IP filtering rules as a series of conditions. That is, the source address is a condition. The destination address is a condition, etc. The pasearch command displays each of these conditions. 

The configured source and destination address for an IP filtering rule can be a single address, a range of addresses (x.x.x.1-x.x.x.2), a subnet (x.x.0.0/16), or even a group of addresses. pasearch uses the From/To to indicate the scope of the condition. In your case you had a single source address (10.1.0.3) so the From and To both indicate that value. For a rule that has a source address range of 10.1.0.1-10.1.0.3, the FromAddr would indicate 10.1.0.1 and the ToAddr would indicate 10.1.0.3.

This topic in the IP Configuration Guide discusses IPsec policy and the concepts of conditions. https://www.ibm.com/docs/en/zos/3.1.0?topic=types-ipsec-policy

Thanks again to Joyce for answering my questions, it makes perfect sense now I know what they are.

Would it be possible to update the docs for the pasearch command to explain what these field are.  I could not find it in the admin book.

Thank you

Colin