Actually is it possible via the registry.
You can either set it per connection or for all KVM connections.
For a single connection you need to go here in the registry
HKEY_CURRENT_USER\SOFTWARE\Stardock\Multiplicity2\Machines\<CONNECTIONNAME>
where connectionname is the name of the connection you are using.
And add a new REG_SZ entry called ViewOnly and give it a value of 1
If you want to set it so every connection is view only you can instead set the following registry key
HKEY_CURRENT_USER\SOFTWARE\Stardock\Multiplicity2\KVM\KVM and create a REG_SZ called AlwaysViewOnly and set that to 1.
