When downloading a bunch of plugins with various licenses, the AU wizard only seems to display one of them and ask you to accept it. They should all be displayed somehow - one license per wizard step, perhaps, or a dropdown combo, or simply all appended with some sort of <HR>-like separator in the license text area.
It works already by described suggestion, a license for each plugin (including invisible modules if any) is contained in License Agreement area, each of them preceded by line-separator and name of plugin. If the case more plugins has the same license (i.e. whole text), names of plugins with the same licenses are separated by comma sign.
Does seem to be showing them all. It is a terrible UI, but by design I guess.
See also Issue #172599.