You need visibility into which SEP agents, SEPMs or other devices may be downloading content from a LiveUpdate Administrator (LUA).
While there is no location in the LUA UI which provides a list directly, the steps below can be used to generate a list of systems download content from an LUA.
This log contains access requests of the LUA. It starts by listing the IP of the device that accessed it. Then the date/time followed by what was requested. Look for GET requests from the configured distribution center (clu-prod is the default). An example below with redacted IP address (XXX.XXX.XXX.XXX)
XXX.XXX.XXX.XXX - - [<date>:<time>] "GET /clu-prod/livetri.zip HTTP/1.1" 200 774721
If you see an IP address in that log, it would represent a connection from one of the devices in the following categories: