1. Is there a ban on donations from foreign interests to political parties?

Egypt
Answer
Yes
Source
Political Parties Organization Law No. 40 for the year 1977 as Amended by Law No. 12 for the year 2011, Article 11:
"...The party may not accept any donation, advantage or benefit from a foreigner, from a foreign or international party, or from a legal person, even if they have Egyptian nationality..."