A switch in time: Gel–sol transitions of a urea‐based [2]rotaxane gelator are controlled by the degree of solvent exposure of the hydrogen‐bond‐donating urea station and the orientation of the hydrogen‐bond‐accepting CO groups of the interlocked ethylene glycol based macrocycle (N blue, O and macrocycle red, phenyl green). Both acid/base and anion‐exchange control can be used to reversibly transition