The FR-2LE doesn't include a track split function, but it does let you insert cue markers as you record. In playback mode you can jump to a cue marker location.
When you're recording and press the Rec/Pause button, recording stops and the current track is closed. Slide the Rec switch to begin a new track. With the 2 second pre-roll turned on, you should be able to close the track and start a new one with a minimal loss of recording time. This might be useful when a band pauses between songs, for example.
Flintstone