How to allow one computer on my network to use DropBox but block for others

[apara]

I am using OPNsense 26.1.8_5 (the latest currently) and have turned on Intrusion Detection (Suricata). One of my network users wants to use Dropbox.  Great! Their computer already has a static IP for other reasons, so I want to create a rule that allows Dropbox access, but only on her machine.

So far, I have found ways to:

• Enable Dropbox for everyone on the network by disabling the check - I don't want to let everyone do this
• Completely turn off ALL rule checking on her machine - Not ideal as it's a Windows computer and I am afraid of viruses

So, what I really want to do is disable Dropbox from checking her destination IP (which is static).  I have not been able to find a way to do this, and while a policy editor is quite fancy, it seems to be missing an option to select a few rules and a Destination IP and convert a Drop to an Alert.

Is this just not possible or am I not looking at the right place?

Thanks.