Advertising specific routes from a subnet

Running Tailscale 1.42.0_4.0.29 from Truecharts on TrueNAS Scale, version 22.12.2

I have a simple TrueNAS scale setup that I can successfully access through tailscale using subnet routing, advertising the route This unfortunately means that users accessing this NAS also have the ability to access printers, my router and everything else. How would I go about specifying IP’s on the local subnet, one at a time? eg, 192.168.x.x and ONLY that adress.

Subnets are specified by CIDR block in Tailscale configuration.

In CIDR notation, a /32 block refers to a single address.