An adjective meaning having a more specific domain or subject?
Solution 1:
One fairly common way to say this is more narrowly scoped (an adjectival phrase).
scope 1 noun ...
- The extent of a given activity or subject that is involved, treated, or relevant: the scope of the debate ... Synonyms ... range [AHD]
(the senses of the verb and participial adjective follow).
narrow: adjective ...
- Limited in area or scope [AHD]
(again, the sense of the adjective-modifier [traditionally 'adverb'] follows).
The phrase has become a reasonably strong collocation; examples from the internet are:
Narrowly scoped subset-analyses were performed additionally for living-donor transplants, pediatric transplants, as well as cases with prolonged cold ischemic time (CIT).
[Comparable outcome of liver transplantation ...; Alexander Kaltenborn et al]
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Outsourcing contracts are trending toward smaller deals. Outsourcing firms should also consider establishing more narrowly scoped relationships [Supply Chain Focused Manufacturing Planning and Control By W. C. Benton]
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More precisely targeted and more precisely directed are also idiomatic.