Moving an open file to a different device

I have an application running that is generating a large (~200GB) output file, and takes about 35 hours to run (currently I'm about 12 hours in). The application just opens the file once then keeps it open as it is writing until it is complete; the application also does a lot of random access writes to the file (i.e. not sequential writes). Right now the file is being saved to my local hard drive but I just decided that when it's done, I'm going to move it to a different device instead (a network drive, NTFS mounted via SMB). To save time instead of moving the file later, is there some way I can suspend the program and somehow move the current partially complete file to the other device, do some tricks, and resume the program so it is now using the new location? I'm pretty much positive that the answer is no but I thought I'd ask, sometimes there are surprising tricks out there...