  We present a mode-coupling theory for the dynamics of a tagged particle in a
driven granular fluid close to the glass transition. The mean-squared
displacement is shown to exhibit a plateau indicating structural arrest. In
contrast to elastic hard-sphere fluids, which are solely controlled by volume
fraction, the localisation length as well as the critical dynamics depend on
the degree of dissipation, parametrized by the coefficient of normal
restitution epsilon. Hence the resulting glassy structure as well as the
critical dynamics are nonuniversal with respect to epsilon.
