The ? in this context, .*?, will find every character up to the first occurrence of the next portion of the match. Leaving the ? out, .*, will suck up every character to the last occurrence of the next match.
This means your regex is finding the first * after a space, the *nadie, then looking from there until it finds *loc. This is why your regex is including that entire portion of the string.
To fix this for your scenario, the regex:
\s\*([^\*]*)\*loc
should work fine. This matches a space, followed by a *, then any number of characters that are NOT a *, followed by a *loc.
Buena Suerte!
