Create a dynamic Lookup Column in SharePoint List New Item page

Hi All,

We have 4 lists, List Parent and List Child A, Child B and Child C. List Parent has column "Project Name" and "Portfolio Name". All the child Lists use the Project Name column from the Parent. However, we need to narrow down the results for each Child list based on the Portfolio Name. For Example,

Child List A is only associated to Portfolio X

Child list B is only associated to Portfolio Y

Child List C is only associated to Portfolio Z

I want to narrow down the Project Name column to show only those entries as required. Is there any way that I can do this by JavaScript or JQuery ?

Thanks,

A