You can use one layout for all your Table 2 data entry for all your cells. (I'd also consider using Model Number as the link instead of cell just on the off chance, however small, that the cell or cells used to manufacture a given model might change.)
You can set up a script that performs a find when the file is opened to limit the records in this layout to just those records that are appropriate to that cell.
Go To Layout [//select Cell layout]
Enter find Mode
Set Field [Table 2::cell ; Get ( AccountName ) ]
Set Error Capture [on]
You can also use Record level access control to limit access for a specific account name to only records for one cell. See "Editing record access privileges" in FileMaker help (Especially the section titled "Entering a formula for limiting access on a record-by-record basis" for a more detailed description of this method.
Thanks Phil, that helped.