  Interacting quark stars, which are entirely composed of interacting quark
matter including perturbative QCD corrections and color superconductivity, can
meet constraints from various pulsar observations. In realistic scenarios,
pressure anisotropies are expected in the star's interior. Recently, the
stellar structural properties of anisotropic interacting quark stars have been
investigated. In this study, we further explore the universal relations (URs)
related to the moment of inertia $I$, tidal deformability $\Lambda$,
compactness $C$, and the $f$-mode nonradial pulsation frequency for such stars.
Our results reveal that these approximate URs generally hold, being insensitive
to both the EOS variations as well as to the presence of anisotropy.
Specifically, we find that more positive anisotropy tends to enhance the
$I-\Lambda$ and $I-C$ URs, but weakens the $C-\Lambda$ UR. For all the URs
involving $f$-mode frequency, we find that they are enhanced by the inclusion
of anisotropy (whether positive or negative).
