How to specify the "Caller ID" when placing an outbound call

[KenDFish]

I'm using SIPSorcery (6.0.9) to place and receive outbound and inbound calls. Everything is working fine, apart from one issue: I can't specify the outbound "Caller ID" (aka CLI). We use a commercial VOIP provider, with whom we have hundreds of PSTN numbers - but any call we place using SIPSorcery uses the providers "default" number.

I'm placing the call like this:

   string destination = $"sip:{call.number}@{provider.FQDN}:{provider.Port};transport=udp";

   bool callResult = await ua.Call(destination, provider.Username, provider.Password, rtpSession)

So that will typically translate to the equivalent:

   string destination = "sip:0123456789@myprovider.com:5060;transport=udp";

   bool callResult = await ua.Call(destination, "myaccount", "mypassword", rtpSession)

How can I specify the CLI that will be presented to the caller?