multitail - custom config (multitail.conf) location

Is it possible to provide a custom location for multitail.conf, or are my only options /etc/multiltail.conf or ~/multitail.conf? I'd like to provide a specific config file that has regexes specific to our app defined, but I can't put this in the account's home directory, or /etc. I care most about the colors, so if it's possible to reference those from a separate file, then that would work well too.