How can this be done? If you Matukio can not handle this that would be a shame.
You currently can't. I have it on the wishlist, but this is nothing done in a minute and an extremely complex topic. Matukio does not only show fees, but also process payments, taxes, creates invoices etc. Doing this all correctly with multiple invoices is nothing done in a minute.
With Matukio 5.3 (beginning next year) it is going to be possible to have multiple currencies (one per event) with matching taxes.
Kind regards,
Yves