At this time, there isn't an option to identify your vendors base on the method of paying them when writing your checks. You'll want to consider manually identifying them as what you have been doing.
Here's an article you can read to learn more about writing a check: Create, modify, and print checks.
But don't worry, I'll pass along your request to our developers so they'll know of your need to automatically identify your vendor's payment method. For updates, you can always visit the following articles below:
Lastly, I've also included this helpful article in case you wanted to create recurring checks for your vendor payments: Create an automatic recurring payment (check) to a vendor.
Should you need any additional assistance while managing your chart of accounts, you can leave a comment below. I'll be sure to get back to you.