Checked it. It is a max of 2 teams of the same association.
As we tend to play same teams over and over again we will draw most likely 75% of AZ and 020 (NL), Tottenham (ENG), Eintracht (D), Midtjylland (DK), Fenerbahçe (TR), APOEL (CYP), Maccabi Tel Aviv (ISR), Qarabag (AZB), Olympique Lyonnais (F) and Malmö FF (S).