Hierarchy search

Hi,

We are doing data modeling wherein I need to build 4 level hierarchy for a field and 4th level field will be displayed in main table record.

- ROOT

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Level 1

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Level 2

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Level 3

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Level 4

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Level 4

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Level 4

My requirment is, user should be able to search records based on Level 2 and Level 3 Nodes. Is it pssible with single HIerachy field or Bettr to have separate look-up fields for Level 2 and Level 3??

Appreciate your expert comments.

Cheers,

Rc