Steps to reproduce:

1. Create host with minimum two IP interfaces (It can be dwo IP adressess in one interface type)
2. Link a random template
3. Select random item on host level

Result:
See screenshot (item.PNG and item2.PNG) - cannot select "Host interface" - it's possible to monitor host only via default IP/DNS address

Expected:

It should be possible to select another source to monitor specified metric.

Based on documentation - it should be editable on host level.

Additional Info:

See screenshot ( (Creating item.PNG) - It's possible to select another host interface when item is created directly on host.