Can I restrict user login access to Navicat Monitor using IP whitelisting?

You can set IP address restrictions on roles but not on individual user. To enable IP address restrictions:

1. Go to Configurations -> Roles & Privileges.
2. Select a role.
3. In the IP Address Restrictions section, click + Add Range.
4. Choose the Type of the IP address: IPv4 / IPv6.
5. Enter the Subnet.
6. Click Save.