The FBAR report is required if a US "taxpayer" (citizen, or resident alien subject to US tax law) owns a foreign bank account worth more than $10,000.
If someone is loaning you money, presumably they are putting money in your bank account for you to spend. If that account is in the US, it's not a foreign account even though the money is from a foreign source. If the account is foreign, and you draw money from the account as needed, then you own a foreign account.
