I'm thinking of the problems that could occur with your inquiry. The first is that you need to have balances on separate addresses to have a different fund source. It would be another step to have an internal transaction first before sending, so it may be straining for you. The second is that having a web-based wallet can be prone to hacking. It's better to have a more secure wallet for that.

Maybe develop something like that. Automatically send it as an internal transaction first before sending it out, etc.