How can I throttle bandwidth for iTunes only?

applications itunes internet data-transfer

Solution 1:

Try Throttled which should let you set a global or application specific speed limit

Related

SMB and AFP work for guest and Administrator but not other users
When printing, does Mac handle converting PDFs to rasters, or does the printer do that?
New user account for installing command line software
Is that possible to make Finder.app to highlight/select newly pasted file(s)?
Relationship between OpenType fonts and PostScript printers, and impact on printing performance?
Save storage space with clean install of macOS?
Macbook shutting down after a screen glitch
Use shell to download multiple files from multiple links
Signing into iCloud [duplicate]
Printing Error Error: invalidfont Ricoh Printer
Can't ping Mac from PC
Stop macOS from reusing Finder windows