How to configure CUPS on Solaris 11.3 - TLS and no TLS?

We are implementing CUPS on a new Solaris 11.3 system. The same system will run an application where users can print to networked printers inside our organisation, or to a printer outside of our organisation over the internet.

For users printing to internal network printers, no encryption is required, but encryption is required for print jobs sent over the internet.

My question is, can CUPS be configured to use TLS for some printers but not for others? Or is it a case of all TLS or no TLS?

I am new to CUPS and any advice would be much appreciated.

Thank you.