Indeed you can. In fact you can have more than one DAW running at one time and use a facility called "Rewire" to send music from one to tother.
Not all DAWs support Rewire but Reaper certainly does. This of course requires a pretty pokey PC but most modern 2 and 4 cores should cope. Good to have lots of memory tho' because each program you open is effectively loaded into ram and run from there. (I was so told anyway!).