I don't use model builder unfortunately so this may be unnecessarily involved.
Iterate Row Selection ->
use row output (green) as input to Get Field Value (specify the field name in the properties) ->
rename the Get Field Value output to something like attribute ->
Insert Select Layer By Attribute tool ->
In the Select by Attribute tool properties, write an expression such as
youFieldName = '%attribute%'
Then connect your data to the Select by Attribute tool