As far as I can see, every relay channel can be inversed but the inversion applies only at the hardware output, so no software inversion is possible using the vertual relay (as far as I can see).
User case: I’ve got a heating pump which of course can be used for heating but also has a cooling mode. The pump has an output that indicates the pump is in coolingmode. My need for an inversion is to switch all thermostats (except for ex. bathroom) to cooling mode. When the output of the pump is off, all thermostats needs to be switched back to heating mode (inversion of the input). Input will be one of the channels from a vmb7in. Other options could be using a software solution aka openhab/nodered, but first I like to see if this can be done with the bus components.