Is it possible to send custom queries onto the bus while logging data using EFILive?

I'm trying to extract some TCM data from a non-supported unit, and was wondering if I could create a custom PID that EFILive could then log. I have not yet done the work to identify the address of the TCM, or the queries that I need to send, but they will all fall within the realm of "normal" data that the TCM would be expecting to receive queries for.

I know you can create calculated PIDs using data from EFILive's built in queries (PIDs), but this isn't what I am after.

I may also use this to extract some data from unknown ECMs as well if it is possible. I expect all the root capability is there since this is essentially the function the tool performs, but is it available to the standard user, or only to the software developers?

Thanks for the responses!