yes you can do.you can install the forge component in your environment and you can modify the component as per your requirement.

@André Pinho :
You have to edit the "Private\JavaScriptNode" yourself:
With for example a variable 'MaxAmount' you can use this in the JavaScript.You cannot deny the end-user to select more files, but only prevent the upload of more than the maximum allowed:
You can for example change this:

if(filesProccessed == numberOfFiles){ //all files have been added to the JSON array

into:

if(filesProccessed == numberOfFiles || 

filesProccessed == MaxAmount 

){ //all files have been added to the JSON array

Also you have to prevent the 

reader.readAsDataURL(file);

to run when MaxAmount is reached.......

Thanks both, I know this could be solved with JS, I guess this was a suggested approach to the component team to look into, rather than forking myself, or just in case I missed an obvious shortcut that avoided the modification of the component. Thank you for the detail Jeroen, maybe the component team can add this to their 'roadmap'.