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

the Afghanistan Constitution, January 3, 2004

article 35: The people of Afghanistan shall have the right in accordance with the provision of the law, to form political parties provided that:4. They shall not be affiliated with foreign political parties or resources. 

Code of Conduct for Political Parties and Coalitions: 28. Avoid accepting cash or in kind contribution from foreign or illegal internal sources http://www.iec.org.af/pdf/code_of_conduct/english/candidates_code_of_conduct.pdf