I would like a delimiter that would be used to identify multiple accounts through one profile field.

IE
minecraftaccount1,minecraftaccount2
minecraftaccount1:minecraftaccount2

If present Community bridge would consider any of the listed accounts to be a valid member.
I have 2 minecraft accounts and use both but do not want to have to create two forum accounts.

Good idea, I will need to do some tests to see how to best solve this.
Sorry for the late response.