EDIT: I got the impression that you were talking about getting files from a Windows installation on the same machine to a Linux installation, not through ethernet from another machine..so what follows is based on that assumption. In the case of network file transfer, see the above post from camorri; I'd just use sftp or scp, if your Linux machine had an ssh server running. Another thing is that you didn't specify which distribution you're using, so the instructions are fairly general..you should edit your profile information and include your distribution there.
Provided that you have ntfs filesystem support in your kernel, basically just mount the data partition you have the files on, then [use a file manager (or shell) to navigate to the correct directory inside the mount point if you don't know what it is and] copy the files as usual.
For example if the files were on Windows partition /dev/sda1 (if "C:" was the first primary partition on your primary harddisk) and /mnt existed and was empty, you could do something like
mount /dev/sda1 /mnt
cp -R /mnt/Users/yourWindowsUserName/Desktop/ndiswrapperdirectory /home/yourLinuxUserName/ndiswrapperdirectory
In practise you probably need to have root privileges (so either put 'sudo ' in front of the commands OR use 'su -' to become root before issuing the commands), and there might be a lot easier way depending on your distribution. For example it could be that you can just open your file manager (say Nautilus on Gnome desktop), click the Windows partition icon in the directory tree if present, maybe type in your password if asked and then just grab the files from the partition as usual.