  Between the different families of pnictide multiband superconductors, LiFeAs
is probably one of the less understood. Indeed, despite the large amount of
experiments performed in the last few years on this material, no consensus has
been reached yet on the possible pairing mechanism at play in this system. Here
we focus on the precursor effects of superconductivity visible in the transport
experiments performed above Tc. By analyzing the superconducting fluctuations
in a layered multiband model appropriate for this material, we argue that the
strong two-dimensional character of the paraconductivity above Tc points
towards a significant modulation of the pairing interactions along the z
direction. We also discuss the peculiar differences between single-band and
multi-band superconductors for what concerns the anisotropy of the
superconducting-fluctuations effects above and below Tc.
