I have done this for installation where there was no place to run the vent
outside.. I purchased a special ventless dryer lint trap from an appliance
store..

Just putting a filter or screen on the end didn't work because it filled up
too fast and was clumsy to clean.. The commercial unit had a easy way to
clean the trap.. The moist air and heat stayed in the laundry room and the
windows would steam up.. The drying time was about 10% longer..

Steve