Have a look here docs.limesurvey.org/Tokens&structure=Eng...tions+for+LimeSurvey under "uses left". You can set a number of uses for each token.
If you put "uses left" = 10, the token can be used to fill the questionnaire 10 times.
If you put "uses left" = 10, the token can be used to fill the questionnaire 10 times.