Looks like you want to put a number of lines in one group.
You can use "Menu - Format - Group - New Group" to create one and add objects to that group.
If you then set the Selection Filter to group, you can select the objects by group.
Ronald van den Broek
Senior Application Engineer
Winterthur Gas & Diesel Ltd
NX9 / TC10.1.2
Building new PLM environment from Scratch using NX12 / TC11