ULX setgroupcantarget

I’m having issues using and/or reading the setgroupcantarget command. If I were to use this:

ulx setgroupcantarget superadmin !%Owner

it would say superadmin can only target group !%Owner. Is it supposed to say that or should it say they can only not target Owner? Also if I do that again, say for Co-Owner, would I have to do it in the same command or seperately.

ulx setgroupcantarget superadmin !%Owner, !%Co-Owner

like that for being an example of them being in the same command.