Multiple Log Files - Indicating filename to log to

Hello,
Is there a way I can specify which file I want to log to on the fly?

For example:
ULOG_INFO("Some log message arg=%d", arg, LOG_FILE1.txt)
ULOG_INFO("Different log message arg=%d", arg, LOG_FILE2.txt)

to log to LOG_FILE1.txt and LOG_FILE2.txt repectively.