How do I select which remote vifm instance will run a command?

I run two separate instances of vifm on my machine: $ vifm --server-list documents photos In one I'm organising documents and in the other photos. Sometimes I'm inside a third shell and would like to give commands to one of the vifm instances. Had I only one instance I would do: $ vifm --remote -c 'normal p' But that does not allow me to select the instance I'm giving that command to. The first instance (in asciibetical order, from what I tested) is always picked to run the command. In other words, I cannot send commands to the photos instance. How can I send a command to the photos instance?