It isn't really a technical problem, so I don't think it makes sense to look for a technical solution. But it's not complicated; like kerning and optical adjustment of letter shapes, someone with an eye for it will need to adjust the size of each logo manually so they all "feel" equal and look good together. For reference, Tobias Frere-Jones has an interesting blog post about optical adjustment of typefaces [1].
As it currently stands, anyone using the font will need to do this themselves.