There are a number of character tags used in Warhammer 40k posts that refers to occupations or factions. Note all of these are chartags...
post #1662794 has commissar which is a rank (a political officer) Imperial guard which is an army and orkz which is a race (alias to orc?).
post #421653 has dreadnought which is a type of mecha, Adeptus mechanicus which is a faction, tech priest which is an occupation in said faction and skull probe which is a type of item.
I have also found Space marines which is complicated since the Adeptus Astartes are not Space marines as described in the wiki and all but one posts depict the Warhammer 40k version.
Space marine has a few more posts that are not 40k but most of them are.
There is also ultramarines, space wolves, blood angels, dark angels, black templars, grey knights and several more that are factions of the warhamer 40k space marines.
Eldar, Tyranid and Necron are races for lack of a better term. Space elfs, alien insect dinosaurs and undead terminator robots respectively. 40k is weird...
Shouldnt they be general tags or in some cases be aliased to their non specific tag like orc?
Side question I can only see one of the necron posts. Are all of the rest loli?