Backend is part of PCap that monitors your network stream, Item collector then takes that stream and monitors it for the EQ related portion and extracts the Item and spell information that it can.
Backend by itself is fine, it depends on the other programs that call it whether they are spyware or not. Since you just downloaded item collector, you should be fine. I've actually never seen any spyware that uses it, but I keep software up to monitor spyware installations also.
I'm not familar with that particular program that detected it, but most apps, you can tell them to always allow access. With allowing access, you should be fine, as long as you have software to detect / scan for spyware and do it regularly.
Yther Ore.