filter relation for 'select' entity

[hi-ko]

When putting a relation to the details view, is there a way to set filter for 'select' entity dialog similar to the view definitions for fields?
e.g. on on contract I want to prefilter on accountId when selecting an offer

[tanya]

What the difference between this post http://forum.espocrm.com/forum/devel...ity-link-field ?