Shared Hosting - Combined Access Log for Multiple Domains?

[JAB Creations]

I'm currently hosting two other domain names in addition to my own. However I am wondering if there is a way to simply have a single access log for all the domain names being hosted instead of splitting them up.

Also if this is possible what would need to happen if the reverse situation were already true? If all the domain names had a single merged access log would the directions be reverse of the original answer or would it require something else? Thanks!

- John