No. A sample license agreement from Tracklib is only valid for one specific song that you produce – the sample license belongs to that specific song. So if you produce more than one song using samples from the same original track, you will need to buy a license for each song.
If you want to use multiple samples from different tracks in a new song, you can find out how to do that here.
However, you can release multiple versions of the same song using the same license. You can read more about how to do that here.