The TSMC 'mm018.l' lib is their 'mixed mode' lib, which is valid for their standard analog 0.18µm process. AFAIR they also provide an 'rf018.l' lib for their 0.18µm RF process, which is dedicated for RF designs (containing on-chip inductors).
Any semiconductor fab/foundry provides libs for their own processes, at least for the most used SPICE simulators like HSPICE, ELDO, SPECTRE ...
so there exist a lot of 0.18µm libraries, each one dedicated to one special foundry process.